Vintage Tek Restoration pictures by Martin - Page 1
Forum section: electronics / testgear

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 18, 2015, 08:13:31 pm
content: following the desire of Yago I open this tread about the restoration of vintage Tek scopes.Story. I have collected and restoratet a lot of them in years of work and study.Electronics is not my job, I am a sheet metal worker. But from kids time - solding !I will start with pictures from some nice old Tek, restoration reports will follow soon (also that is work ..)You can sort old Tek by numbering.200 series are little portables, cold.300 series are mostly SONY-Tek made in japan, mostly they are portables also400 series are compact scopes for dayly work, mostly cold, some older of them have tubes or nuvistors also500 series are Classic Tek, very glowing, some of them use plugins.600 series: also , I know only one.2000 series: modern compact scopes, some of them made in UK5000 series: the small laboratory class with plugins, cold7000 series: the high laboratory class with plugins, coldBegin.Tek 310A is a "service scope" from the late 50`s, made in USA. there are 33 tubes glowing inside, the bandwith of that single beam scope is 4MHz cal.It needs 175 Watts to work. They was oftenly in use for the service of glowing computers by IBM. A special fun is the foldet chassis technology, you can open that scope like a book. There is no cards inside, all is soldet in ceramic strips.2x Tek310ARemember: For soldering ceramic strips is a special solder to use with 3% silver. Every Tek oldy have a little roll inside, for repairs.Tek 305 DMMis a 5MHz SONY-Tek, Single Beam portable 2 Channels + autorange multimeter. It have recharchable batterys inside. The multimeter have a own DC-DC converter, so it is earth-free. When no button ofthe multimeter is pressed you can read the voltage of the battery.All transistors inside are in sockets, not soldet.Tek 422, a Classic.Type 422 is around 1965 made, a 15MHz single beam 2 channels Tek in MIL quality. Early 422 have nuvistor inputs, later changed to Fet. In the high voltage area are glowing rectifiers, the rest of the scope is cold. The is no fan, no wholes, so a 422 looks inside always like brandnew from production. And most what you see is golden.... the quality of this instrument is amazing !There was a option battery pack, usind 20 pcs. of the large D-cells to work 4 hours portable. A 422 eat arout 100 Watts.Tek 453, 453A, 454, 454A453 and 453A are 50 MHz, 454 and 454A are 150 MHz Classic Tek scopes in MIL quality. See 422, early use nuvistor inputs, later use Fet- and in the High voltage are little rectifier tubes 5642, the rest is cold. They have a fan and must be cleaned inside yearly.This is my 453, on a scope mobil K212to be continued with 500 series.greetingsMartin

author: tautech
author_rank: Super Contributor
timestamp: January 18, 2015, 08:17:50 pm
content: More please.Thanks for sharing.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 18, 2015, 08:34:32 pm
content: Tek 500 Series, the "Classic Tek".The care, restoration and collecting of them is very special. They test not only volts and frequencys, also the WAF (womens acceptance factor)Small 500 Tek have a weight of 40 pouds, bigger ones are to handle by two persons or they have their own Tek mobile to roll in the floor...We will see the most of them here.Its impossible to collect them all, so there must be a guide line. My was, to collect the complete glowing dual beam series from Tek.This is doneTek 502, later 502A is a Dual Beam NF Scope, low bandwith but high sensitive differential input on both channels. 40 pounds come in the house, welcome !all must be washed, a very lot of work. Also around every part at the ceramic strips, many hours cleaning...later you can see what you have done...he is workingtake a place.in continue we look for a Tek 551This problem is much bigger.greetingsMartin

author: robrenz
author_rank: Super Contributor
timestamp: January 18, 2015, 08:39:01 pm
content: Very nice work Martin.Mas a fellow restorer I can really appreciate what you have done.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 18, 2015, 08:45:47 pm
content: Tek 551, Dual Beam Osciloscope.This is one of the greatest Classic Tek, It have a seperate PSU and requires always his scope mobile (Type 500/53)The bandwith is at minimum 25 MHz, the scope have one delayed time base. The CRT have common horizontal deflection plates and seperate vertikal deflection plates for both channels. 2 glowing kathodes, a true Dual Beam scope.Relatet to the plugins a 551 use around 100 tubes and eat 850 Watt from the plug.the tubes stabilized PSU, open. It have also a fan like the Top.leftside from our 551 we see the Tek 555 "triple nickel" what will be the next one in collection.greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 18, 2015, 08:57:45 pm
content: Tek555 "triple nickel"33 MHz , Dual Beam, all is double, 2 time base also.Like the Tek 551, but extendet. 555 have additional a saturation reactor for regulating the complete heating of all tubes also, so it can work feed by generators also, a military requirement. A triple nickel use when 2 CA plugs are installed 117 tubes and needs 1kW from the plug.the restoration I will type tomorrow, this will be a longer storygreetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 18, 2015, 09:57:19 pm
content: the 555 was after cleaning and change of some tired tubes allready working.... but times later arrived a second one, and this was in a very poor condition.there was only a bezel for camera mounting, but missing the Tek typical aluminium frame, so i looked to get a spare part.Also a very lot of dust all over, and some demolition in the scope mobile, defect PSU, a missing beam2 and some other.At first i swapped the PSU with the running one from the first 555 to continue the testing.1.) missing Beam 2Testing and measuring in the high voltage area of beam 2 with a VTVM. The old instrument found a missing isolation between the filament of Beam2 and ground, allready is there a high isolation, I found 60k.After desoldering of some wires I tested at the heating transformer coil and found there the missing isolation !60kThe only possible way to repair that is another high isolated heating transformer to feed the filament of the CRT, Beam2. I made one from a old AC Adaptor, the small transformer is a high isolatet one, very good to repair the Tek. The filament is wired to the cathode, so there is a -1.500Volts related to the chassis present and this reqires the high isolationat the 2 screws to fix the small transformatordonestarting the oldie again...that is aDUAL-BeamThen the defect PSU...washing of coarse, allcleaning the contacts of the relais, swapping defect time relais tube 6NO45 and the regulating diode 2AS15A...the power switch was bad, the light bulb also, changed to new..testing all voltages, the +225V was too high, found a resistor there what was much higher then OK, changed to a new..then the PSU start allready workingto continue washing ....here you see the tube familys of the 2 seperate channels following the plugins...a working 555but the pre-owner have cuttet a part of the front plate of the scope mobile to use it as storage for anythingI have rebuild the plateand send in a eloxal company for coatingcomplete with the new plate it is usefulafter calibrating the old 555 was finally clean and allready working.can any Tek glow like a triple nickel?may be a 517, I will look to get onenow there are 2 Dual beams to complete the line, the 565 and the 556to be continued

author: valvedoctor
author_rank: Contributor
timestamp: January 18, 2015, 10:10:32 pm
content: Great work Martin, I have lots of vintage test gear but never found a classic 500 series scope. It's one of my wishes to find one.

author: photon
author_rank: Frequent Contributor
timestamp: January 18, 2015, 10:15:46 pm
content: Bravo, Martin!

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 18, 2015, 10:20:05 pm
content: hello valvedoctor from canada,look athttp://sphere.bc.ca/test/tek1.htmlto find one, this is one of the best places.greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 18, 2015, 10:34:11 pm
content: Tek 56510MHz Dual Beam, all double, 2 vertical slots for plugins.This nice and very glowing Tek is to handle by 2 personsI have buyed that, it was healthy ! Only complete washing, a new calibration and welcome in the collection.greetingsMartin

author: Yago
author_rank: Frequent Contributor
timestamp: January 18, 2015, 10:46:01 pm
content: Thank you , thank you, thank you!!!These are so great, I think the pictures have made me gay.I coming out as a Tekosexual!O0The inside of Matins scopes are cleaner than the average surgical theatre in UK!Brilliant work and collection Martin, greatest of respect and gratitude from me.Thank you again!

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 18, 2015, 10:48:06 pm
content: Tek 556, the last warm Dual Beam of Tektronix.this one was my first Classic Tek, I was young and stupid. There was a bad deflection tube, I found that directly.But a missing Beam2 problem in high voltage, I changed all tubes there, buyed spare HV transformer and some other much expensive things without catching the problem. At very last I made measuring all resistors there and found a bad 20k, this ! was the problem.556 ist to handle by 2 persons, after breakfast, not before.It is a Dual Beam, all double, full 50MHz.The socket side of the CRT is like the arm from a man, all is extremly large in this machine.On the picture the 556 is plugged with a 4-channels at Beam1 and a spectrum analyzer pluging at Beam2. So Tek may not tell us a mixed domain oscilloscope is a brandnew idea...- end of glowing Dual Beam here -when you go anywhere to pickup a Tek you want to have, oftenly the Tek is not allone. And you can not get this and dont accept the others, you bring them all at home. So there arrive some other classic Tek in your home who are no part of your wish list. Enjoy and give them also a good home531, 533A, 535A, 545A, a Transistor Curve Tracer 575, a Rack-565 and some others,to be continued.greetingsMartin

author: TerraHertz
author_rank: Super Contributor
timestamp: January 19, 2015, 01:08:24 am
content: Fantastic and beautiful! I love these old Tek scopes so much! But simply don't have the space and money to collect any, in competition with other pursuits also demanding space and money. Thanks for all the pictures! You're restoring them very finely, and it's great to see.Very surprising to see the 502A had UHF input connectors. I didn't know any scope *ever* used those.The need for special silver alloy solder for those ceramic tag strips was news to me too. What happens if you use ordinary tin-lead solder?My sole token collection item from that era is a Tek 500 series plugin, so I'd have an example of the ceramic tag strips and valves construction to show people who've never seen such things.

author: free_electron
author_rank: Super Contributor
timestamp: January 19, 2015, 01:14:37 am
content: and i thought i was nuts because i have 8 or 9 scopes ...

author: Electro Fan
author_rank: Super Contributor
timestamp: January 19, 2015, 01:24:33 am
content: Tubes and Tektronix oscilloscopes, beautifully restored by a man who loves them (lots of them)Pretty fantastic

author: joeqsmith
author_rank: Super Contributor
timestamp: January 19, 2015, 01:28:47 am
content: Nice!What is the system on the far left center?

author: GreyWoolfe
author_rank: Unknown
timestamp: January 19, 2015, 02:38:56 am
content: Quote from: valvedoctor on January 18, 2015, 10:10:32 pmValvedoctor, if you ever come to central Florida for vacation and have room in your vehicle, you can have a 533A. It will need work but you can have the joy of restoring. I took it as a conversation piece to prevent it from going to the recycle center.

author: tautech
author_rank: Super Contributor
timestamp: January 19, 2015, 07:02:09 am
content: Martin.MI would never expected that your collection is so vast and so well restored.As you can see there is much appreciation and admiration of your efforts.We hope you have yet more to show.Step by step restoration is a forum favorite.Do you have any early solid-state units from the time TEK acquired UK based Telequipment?I had a D83 (60 MHz) as my first scope and it was a nice unit despite the ongoing repairs required.

author: MadTux
author_rank: Frequent Contributor
timestamp: January 19, 2015, 07:26:58 am
content: Quote from: joeqsmith on January 19, 2015, 01:28:47 amLooks like a Rhode & Schwarz Polyscope IIIhttp://abload.de/img/010h8kvk.jpgwww.classicbroadcast.de/downloads/rohde_SWOB3.pdfHas a frequency sweep generator inside and plots frequency vs amplitude of DUT (amplifier, filter etc)But what is that strange connector on the bottom??

author: helius
author_rank: Super Contributor
timestamp: January 19, 2015, 07:54:39 am
content: That is a Dezifix connector by Rohde&Schwarz.http://www.helmut-singer.de/stock/-850494811.htmlSimilar idea to GR900 connectors, they are hermaphroditic.

author: Richard Head
author_rank: Frequent Contributor
timestamp: January 19, 2015, 08:03:47 am
content: Martin MWhat a great post. Thank you for sharing with us. Keep up the excellent work.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 01:05:31 pm
content: Quote from: tautech on January 19, 2015, 07:02:09 amTelequipment, S51B, warmthere was a tired tube and little problems in the C from high voltage... and a lot of dust.After restoration that scope was ready to work, and clean inside and outside.The tubes are original from UK, "Brimar" labeled.greetingsMartin

author: sean0118
author_rank: Frequent Contributor
timestamp: January 19, 2015, 01:26:11 pm
content: Wow, great work and nice collection, how many in total do you have?

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 01:36:37 pm
content: Fine Arts by TektronixThis spare part may be the most rare of all, its a never used, nos, CRT for a 549 Storage Oscilloscope.It works like a normal CRT, additional the screen is splittet in 3 fields, and behind the phosphor screen are super fine gold meshes, connected.This tube can store the picture ! seperate in the upper and the lower half of the screen. The storage technology was a milestone in engineering, made ba Tek in the own CRT manufacturing. There are also 2 flood cathodes to erase stored pictures from the screen.In storage mode the scope work like a pen, where the point was runnig you will see the line. So it can display fast single shots, also very slowly movings as a Amplitude.The life time of that CRT in normal mode was around 10.000 hours, in storage mode only 500 hours.When the storage mode is burn out you can still use it as a normal high quality scope. This CRT was ugly expensive, hundrets of Dollars.The separation of the screen in 2 storage and a non storage zone was made to extend life time by using only one of the both. The 3. zone ist left side from the both storages in full heigt, there is the start point of the beam, this will not be stored.I am the lucky owner of this fresg CRT, also I have a Tek549 with a very healthy CRT inside.At first we look pictures from the CRT.greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 01:49:40 pm
content: Type 549, Storage OscilloscopeThis picture shows a stored single sweep from the spectrum analyzer plugin.A great Classic Tek, single Beam, 2 Time Bases, 1 Slot for 500 series Vertical Plugins.Bandwith at minimum 30MHz cal. Buttons for Store and Erase.greetingsMartin

author: 22swg
author_rank: Frequent Contributor
timestamp: January 19, 2015, 01:59:27 pm
content: Text book stuff . Thanks for sharing.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 02:10:09 pm
content: Tek 533Asingle Beam, 15MHz cal., 1 slot for pluging.There are 50 tubes glowing inside. So valvedoctor knows what he can pickup there in FloridagreetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 02:37:26 pm
content: Tek 535A, is a 533A but with Dual Time Base.Tek 545A is a faster Tek, up to 33MHz. A very glowing classic with distributed amplifier line.looks like a 535A, but the vertical area is only +- 2 div. I am not shure, 79 tubes inside, ~700WTek 515A this is a lower cost 15MHz single Beam, no slot for plugin. Have a switch Input a or Input B.1 Time Base, also the large 5 inches screen like the big brothers. 33 tubes are glowinggreetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 02:50:17 pm
content: Tek 585Aup to 100MHz with tubesIt have a very special CRT what use a group of 16 vertical deflection plates including the coils for delay to forward the 100MHz...585A have own plugings and can use the plugins of the other 500 series Tek only with a special Adaptor, you see this here.He have 2 Time Bases, the vertical working is +- 2 div.Some words about High Frequencys...This old machines was working in ultra high frequency ranges by using special plugins, Sampling systems.So do not wonder when you see a Tek 533 or like that displaying a 1 GHz sine wave by using a Plugin Type "N"Also the spectrum analyzer plugings was shameless for the time, the fastest systems , 1L40 and so on, can read up to 40GHz in the tube Tek.The very long time of use was a follower of the fact that a lot of companys have buyed a hughe of this expensive plugins, ant they can only work in a Classic Tek. (( Except ! you can get a Case with internal PSU and one slot to use one Plugin with any scope, this is the Tek tYPE 132))greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 03:08:42 pm
content: End of the 60`s was the time of the first full transistor Mini Tek ScopesFast was still a tube Tek, but something up to 5mc was possible.SONY Tek Type 323, build 1967.A single Beam portable with recharchable Batteries and a little transformer to load that. 3kgThe little Tek was in the catalog listed to 925 us$ , too much for a radio servive shop. So they are still rare in the market.Highest quality inside, all is golden, all transistors are in sockets. A 323 use 1,6 Watts from the Battery, so it can work a very long time.ten years later Tek made the 200 series, very expensive Mini-Tek portables.221 is a single channel 5MHz212 is a 2 channels 0,5MHzThe little 213 is a single channel 1MHz and includes a very exactly RMS onscreen multimeter what can read voltage directly from the probe.Tek 221, 212, 213There are also: Tek 214, is a 2 channel 0,5 MHz Storage Tek,and 211, what is a half 212. I do not own the both, still searching to get themsize relations221 on a 565greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 04:35:37 pm
content: Tek 575, a glowing Transistor and Diode Curve Tracer...The old Tek can load the test transistor with up to 200 Watts, the maximum output voltage is 400 Volts.Any mistake in the adjustement and the test is friedFor curve comparements, matching, there are 2 identical socket and a switch between them.For much more power is a seperate box to use, Tek 175. This is hard enough to destroy also the biggest transistors.greetingsMartin

author: Rupunzell
author_rank: Frequent Contributor
timestamp: January 19, 2015, 04:40:57 pm
content: Such a wonderful and carefully restored collection of classic TekThis is a collection that would put a smile on Jim Williams with great delight as he was also a fan of classic tek. Jim used a Tek 547 for a great deal of his analog work up to his passing in 2011.http://www.edn.com/electronics-blogs/anablog/4311553/Jim-Williams-loved-Tektronix"But you do have to love the “IN TEK WE TRUST ” on the obverse of the bill. That was Jim’s ultimate attitude about test equipment. They were like good friends, people you could trust, people that would not steer you wrong."That quote from Paul Rayko would be one of the prime reasons why there are long time analog folks who still use classic Tek to this day.http://www.computerhistory.org/atchm/an-analog-life-remembering-jim-williams/Bernice

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 05:09:35 pm
content: I am a graet Fan of Jim Williams !The pictures he have hanging there upside from the table are made with a Polaroid Camera for Tek Scopesbut its hard now to get filmss for the apparatus !greetingsMartin

author: coppice
author_rank: Super Contributor
timestamp: January 19, 2015, 05:13:13 pm
content: Quote from: Martin.M on January 19, 2015, 05:09:35 pmAnyone who thinks analogue scope are better that digital should be forced to spend a week with one of these cameras trying to analyse a rare event.

author: Rupunzell
author_rank: Frequent Contributor
timestamp: January 19, 2015, 05:24:47 pm
content: Been there done this with that Tek C12 camera. Not FUN at ALL...This is where a modern LeCroy or similar will get it did.There are very good reasons why the particle Physics folks get interested in digitizers which were the origins of LeCroy.Really a matter of choosing and using the proper instrument for required measurement. This is where knowledge of instrument strengths and limitations really matter.BerniceQuote from: coppice on January 19, 2015, 05:13:13 pm

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 06:05:23 pm
content: I dont like discussions "what is better"...For the money you have to pay for your probe I start a scope. What is betterI am collecting old test equipment, not modern DSO. My fastest single shot can be from a Tek 7104 with a P11 beam and photo option, on a fast triggered C71 camera. What you think I have payed for the set?The tantals and elkos are all changed by low esr long life parts, I remove the dust from the fan all 3 months. so I hope the old 7104 is still ready to make a photo when the DSO ist fallen in the junk box.btw. I have also an old DSO, it needs a repairgreetingsMartin

author: -jeffB
author_rank: Regular Contributor
timestamp: January 19, 2015, 06:07:21 pm
content: Very, very nice!My very first scope was a 502. I needed more bandwidth from the very beginning -- wasn't it about 1MHz vertical? -- but Ilovedthe 200uV/cm sensitivity. And the differential mode, although I barely knew enough to take advantage of it.I eventually put it into storage for a few years, and when I hauled it out and powered it up, I watched the trace drift across and then snap off the top of the screen, never to return. I imagine it was just a failing capacitor, but I had newer scopes to occupy my time, and didn't really have space for the 502. I donated it to a high school; I hope someone there was able to return it to service. (I think the guy I originally bought it from had gotten it from our high school, so it seemed fitting.)

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 06:16:46 pm
content: hello Jeff,the 500 series Oldies know a diff plugin 1A7 or 1A7A where the maximum sensitivity is 10µV/cm or the much older "E" with the XLR-Plug at the front.In the 5000 series* (cold scopes) ist this a 5A22N, in the 7k series a 7A22.greetingsMartin*

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 19, 2015, 06:26:55 pm
content: Unknown L or C = Tek 130Tek produced them over a time of 21 years. Good calibratet it holds < 3% accuracy. Also very small C like 4.7pF will bee tested true.greetingsMartin

author: Yago
author_rank: Frequent Contributor
timestamp: January 19, 2015, 06:53:02 pm
content: This thread gets better and better!

author: guido
author_rank: Regular Contributor
timestamp: January 19, 2015, 07:02:10 pm
content: I have the same addiction, just no tubes. 7603 with 7A22/7A13, 7623A with 7L5+TG, 7704A on a chart with more regular plugins. Three more three-bay mainframes as spare/parts units (7603/7623 and a Navy ~7403/7603) and another R7603 parts unit.The 7603 and 7623A will get new supply caps soon.Currently working on a 5115, had to replace the supply caps. Two were dead as a dodo.When it's ready, i can see if the plugins have some life in them. One is a 5L4N SA

author: Howardlong
author_rank: Super Contributor
timestamp: January 19, 2015, 07:02:35 pm
content: Quote from: Yago on January 18, 2015, 10:46:01 pmGoing to need bromide in me tea tonight that's for sure.

author: _Wim_
author_rank: Super Contributor
timestamp: January 19, 2015, 07:34:59 pm
content: Wow, thanks for posting this! Super nice work.

author: TerraHertz
author_rank: Super Contributor
timestamp: January 19, 2015, 11:38:42 pm
content: This thread gets more and more awesome! Great stuff Martin.I second the view that arguing about whether analog or digital is 'better' is pointless. If one has some target use that requires digital storage, then the argument is moot. If you are collecting and using older scopes because of their aesthetic and historic qualities, then the argument is also moot. If you're using old gear because it's cheap or free and all you can afford, then even more moot.The only people who want to argue on this topic are those who don't really know what they need, apart from wanting to argue.And yay the 5103! I said I don't have room and $ to collect, but I can't resist when something turns up for free, and would likely have been destroyed if I didn't save it. Like the 5103Ns below.The adjustable bandpass filter on the 5A22N plugins is cute. That was the first time I'd had something like that to try. I didn't get a 7A22 until quite recently.OK, so how much *did* your 7104 cost? Mine is a shameful story - reasonably cheap (apart from the horrific shipping cost), working on arrival, then when starting disassembly and cleaning I badly broke it. Failed in attempts to repair - partly gave up in disgust with myself for the careless goof. Someday will try again. Ha ha, when the pain has faded enough.Martin, one serious question - in your Tek researches, have you ever come across a detailed technical description of Tek's process for making their anodized aluminium front panels, with the coloured lettering and shading dyes embedded into the anodized layer?I wish I could duplicate that, but so far have been unable to find anything on how Tek did it. Today there's 'photo-anodizing', but the process is expensive. I'm thinking that Tek must have had a reasonably simple technique, since they began using it so early and stuck with it for so long.Also, it's beautiful.

author: Richard Crowley
author_rank: Super Contributor
timestamp: January 20, 2015, 12:04:28 am
content: I suspect you could email the Tek museum guys and ask them about how they made those beautiful panels.There is almost certainly somebody there who knows who worked on them.Martin's beautiful resorations (and photographs) make me ashamed of that big old 500-series hulk out in the back yard.I suppose if I ever need a space-heater for the shop, I could restore the old thing.And I have a couple of newer model things down in the basement.But my Rigol DS1104Z does most everything I need and then some.At lower cost lighter weight, and almost smaller footprint than just one 500 series plug-in.Although I feel a slight twinge of guilt since I live here in the heart of the Tek territories (Silicon Forest).And I've got one of those beautiful Polaroid cameras around here somewhere (new in the box from the Tek "Country Store" surplus sales)Dunno what good it will ever be to anybody except as a museum relic.

author: joeqsmith
author_rank: Super Contributor
timestamp: January 20, 2015, 01:22:36 am
content: Quote from: MadTux on January 19, 2015, 07:26:58 amThanks for the links. Looks like the same system. I like it.

author: -jeffB
author_rank: Regular Contributor
timestamp: January 20, 2015, 01:39:10 am
content: Quote from: Martin.M on January 19, 2015, 06:16:46 pmIn the good old days (15 years ago), Duke University and NC State had surplus stores that frequently had old Tek equipment. I bought a number of scopes there, cleaned them up (nothing like your overhauls, though), and sold them on eBay. I think I may have gotten one or two of the 500 series with plugins. I know there were some 454/465/475 units; I frequently saw 5000-series stuff, but none of it was working, and I don't think I ever bought any of it. I almost never saw 7000-series stuff; I guess it wasn't obsolete enough.I bought a 7834 mainframe and a bunch of plug-ins on eBay. I don't have a 7A22, just a 7A13. If I ever start using it heavily again, I might try to pick up a 7A22.

author: mazurov
author_rank: Frequent Contributor
timestamp: January 20, 2015, 02:04:44 am
content: Quote from: Richard Crowley on January 20, 2015, 12:04:28 amI used one to fit a digital cam to 7K. Still using it to take pics of single shots, sampled signals and other stuff that can't be easily presented to a digital scope via sig out.

author: JacquesBBB
author_rank: Frequent Contributor
timestamp: January 20, 2015, 08:17:27 am
content: Martin, this is fantastic work !Could you give more details on your cleaning technics. You are achieving such perfect resultsthat this could be of use for many in some more modest projects.ThanksJacques

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 02:03:37 pm
content: The cleaning of Tek CoversYou need:A spraybottle windows cleaning fluid (this sort I have tested to be electric neutral),a old machine brush, very fine, material = "Messing" ( CuZn40 )2 dry textils, natural baumwolleBegin: spray enough from the windows cleaning fluid on the dirty covermove the brush, circles ...allover... then remove the dirt with textil No1 and make it dry.It looks now clean, but like a paint. Begin to polish the dry cover with the second Textil, make that good !The old Tek begin to be glossy !greetingsMartin

author: PaulAm
author_rank: Frequent Contributor
timestamp: January 20, 2015, 02:16:12 pm
content: I have a Sony/Tek 335, a full function 35 MHz 2 channel delayed sweep scope shrunk down to something you can hold in your hand, and it will run off of 12V. One of these days I'll post a teardown of it, build quality is awesome.I have my eyes open for a 213, but am not terribly hopeful of finding one for what I want to spend.The 5103 D1 and D2 display modules will work in the 577 curve tracer.I pretty much stick to solid state equipment, although there are a few nuvistors scattered around in there.I think Martin should get the designation of Tek Museum, European Division

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 02:30:19 pm
content: hello Paul,the last 213 sale I have seen here in germany goes in the bay to a bid of 168€.My 213 I found it also in ebay, was only 67,-€ but my bid was 333,- to make shure that it will find the way to me and not to another locationBy using a bietomatic, set automatic the bid in the last 3 seconds before ending of the auction, so the others cannot reply.That little Tek is rare and expensive. All Mini-Tek are expensiv, also today. Collectors want to have themWhen you take a look in the old Tek catalog, the little 213 was new a 1.200 us$ Scope. So the 200,- today may be allready.greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 02:48:09 pm
content: a poor 5403 (the same then 5103 but 60MHz and readout, graticule illum) fallen on the nose?I found him in the bay "defect"now..i tneeds a little trace rotation cal to be finish restored.greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 03:40:25 pm
content: This is the last true Dual Beam made by Tek. All later scopes are DSO.7844 is a true Dual Beam with at minimum 4ooMHz bandwith. The acceleration voltage of the CRT is 24kVMy scope have options:78 = blue beams, P1121 = the dedicated slots optionhis scope mobile is the Type 204. You see there a polaroid camera for 7k alsoThis scope was also the most expensive Dual Beam of the complete family.I have collected some useful (or not) plugins for him.The last I have found was a 7D01 Logic Analyzer with display formatter DF2. The set requires 3 slots.Actually in restoration, repair is a 7L5 opt.33

author: coppice
author_rank: Super Contributor
timestamp: January 20, 2015, 03:52:37 pm
content: Quote from: Martin.M on January 20, 2015, 02:30:19 pmOf course. A lot of people want a little electronics nostalgia for themselves, but not everyone has the amount of space you seem to have.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 04:29:46 pm
content: my work room is also very small.About phosphors.Tek made self the CRTs, so it was possible to order some sorts of phosphor with various colors and delay time.The common phosphor of the most oldies is the bluegreen type P2 (see the 555 restoration). The delay time is around a half second.Later it was changed to the type P31 grass green (see the 5403), it was the same but more resistant for burn in.Specials: For using the polaroid cameras was the fast blue type P11 the best. You see that here in the subject on my Tek551 and on the 7844.The most amazing type may be the P7. It is a dual coating with a fast light blue and a very long delaying greenyellow. I have a triple nickel with this dual color outfit, see hereThe point is slowly running, 0,5 sec/div. Tek555, P7 !greetingsMartin

author: Zucca
author_rank: Unknown
timestamp: January 20, 2015, 04:46:03 pm
content: ThanksMartin.Mthis post make me feel so small, there is so much we can learn from the past...

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 04:50:07 pm
content: Quote from: joeqsmith on January 20, 2015, 01:22:36 amThat is a R+S Polyskop III SWOB, yesthis one is full extendet, there are 12 oscillators in the bank. Each of them is build with a very fine sweep controlled Low pass filter to provide a clean wave without any harmonics and with a constant amplitude.There is a crystal controlled marker generator also.The monitor top have slots and provides simultan 4 channels. In my SWOB are plugins:HF-Input (with Dezifix),Lin/Log with HF-Input, Dezifix (requires 2 slots and 2 channels)DC-Input by BNC, very sensitive for Demodulator probes.The oscillator collection provides sweeping in 12 areas between low f and 1,25GHz. That fat SWOB can check all kind of HF-parts, I like to use it for LC testing, adjust for resonance and bandwith.

author: coppice
author_rank: Super Contributor
timestamp: January 20, 2015, 05:15:14 pm
content: Quote from: Martin.M on January 20, 2015, 04:29:46 pmI'd never thought about this before. Lots of people offered a really slow orange phosphor option for their scopes, but I don't remember ever seeing a Tek branded scope with such a tube. I think I saw Telequipment branded scopes with orange faces, but I think most Telequipment branded models used commercially available British tubes (e.g. Brimar ones).

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 06:01:17 pm
content: Quote from: zucca on January 20, 2015, 04:46:03 pmthank you much ,if you are interested, or you want to learn or repair an Tek Oldie, simply use my homepage and register there in the little FORUM.There ist the headquarter of the german Tek-Oldies friends (a lot of english there, the world have found us).At next I want to write some aboutHardcore RestorationgreetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 06:13:22 pm
content: A friend sent me message that he have a Tek there, 515A , defect, not possible to repair, and missing the complete case.If I want that for parts, to pay only the postage.doneThe old Tek arrived, it was true.after looking the disaster I made decision to make a Restoration

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 06:41:54 pm
content: Tek 515A, Hardcore Restoration.1. cleaning inside (there is no outside...you know that, washing, drying....2. electronic repair.Tubes was complete but I found a defect double triode and some interrupted cables from bad handling without case.Also was some replacement of cermaic C in the high voltage area required, following tests and recalibrationa time later "for parts" waked up.3. Removing the PC-fan I found there and do a replacement with a original Tek fan.Rebuilding of the complete cover including the filter frame...In my collection is a second 515A, this I used for measuring and planing the rebuild parts for my "for parts".Rebuilding of the filter frame, from Aluminium sheet 1.5mm. cutting, folding, forming corners, welding the cut, make that straight at the corners with sandpaperdrawing the Covers in CAD, convert this to CNC data and cutt the sheets on a nibble mashine at my work.Then i foldet them on the press brake exacty, the large corner is a half inch. There was no tool in this size, so i used a selfmade.donethe new covers of "for parts"following the test if the new jacket will pass?looks good, "for parts" is now a Tek515A.Then I have sent the covers and the filter frame to a burn pinter company to make that Tek blue.They was blind in colors, wrong blue... but OK, this is so or so a very special Tek...no Tek bluemy 515AgreetingsMartin

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2015, 06:49:10 pm
content: QuoteI can plainly see the Telequipment heritage on your 5403.It's form isverysimilar to the D83, large CRT, mainframe controls at top right, plugins.I'd go as far to say it's a Telequipment with Tek badging.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 20, 2015, 07:04:22 pm
content: I am not shure but thinking Tek made not self the display part of the 5k series.This scopes was a low cost series.greetingsMartin

author: robrenz
author_rank: Super Contributor
timestamp: January 20, 2015, 08:02:26 pm
content: Very nice metal work there Martin

author: Howardlong
author_rank: Super Contributor
timestamp: January 20, 2015, 09:00:25 pm
content: Right, that's it, the wife's just walked out on me.

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2015, 09:05:25 pm
content: Quote from: Howardlong on January 20, 2015, 09:00:25 pmMore room for vintage scopes.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 20, 2015, 09:05:46 pm
content: Who needs a wife when your scope is hot and heavy like this?Tim

author: Howardlong
author_rank: Super Contributor
timestamp: January 20, 2015, 09:45:14 pm
content: Quote from: tautech on January 20, 2015, 09:05:25 pmThanks mate, I knew there'd be a silver lining!

author: TerraHertz
author_rank: Super Contributor
timestamp: January 21, 2015, 01:21:55 am
content: Quote from: Martin.M on January 20, 2015, 02:03:37 pmHey, almost exactly the same as I use for HP & Tek crinkle-finish cases. Except I use a slightly coarser brass wire brush.But what I want to know, is any method to clean in tangles of delicate components? Other than just slogging away with little bits of cloth held in fine forceps? Which I find exceeds my patience, so generally I just use a compressed air gun and overall brushing with a small paintbrush, dry.Perhaps something like a miniature powered rotating feather duster might be good, but I didn't get around to improvising something like that yet.Your metal working is giving me a lot of envy. Slightly less burn after seeing that you got the top edge fold position a bit wrong on that 'broken scope' rebuild. Folded AFTER CNC punching all those little holes, and no way back. I bet that pissed you off. I though that was the kind of goof only I make, in my totally amateur metalworking efforts. Makes me feel better to see a professional do it too.Edit to add:Quote from: Martin.M on January 20, 2015, 06:01:17 pmAh! You didn't mention that before, or I missed it. Where your pics are hosted.http://www.wellenkino.de/Nice site!

author: joeqsmith
author_rank: Super Contributor
timestamp: January 21, 2015, 01:43:12 am
content: Quote from: Martin.M on January 20, 2015, 04:50:07 pmWould like to see this thing in operation. Vintage high tech!

author: coppice
author_rank: Super Contributor
timestamp: January 21, 2015, 02:09:45 am
content: Quote from: tautech on January 20, 2015, 06:49:10 pmI thought it was the other way around. A few Telequipment scopes, like the D83, looked like a Tektronix scope had been rebadged. The real Telequipment scopes had a completely different style, mostly with wide horizontal plugins.Tektronix had a lot of duplication of effort in low end scopes, with the US company making products that targeted exactly the same segment as completely different designs from Telequipment in England. For example, the US designed (and probably Channel Islands built) T900 series was sold in mainland Europe, while completely different Telequipment models (made in England) were sold into the same applications in a number of other countries. They did eventually sell the T900 series in Britain, but the only interesting model was the T912 - a (relatively) low cost storage scope.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 21, 2015, 06:01:14 am
content: Quote from: TerraHertz on January 21, 2015, 01:21:55 amYou must look at first what parts are water-sensitive, and cover them with a plastic foil.At first use the air pressure, yes. The best place ist outside, so the dust will not go in the work room.Then put it inside on the table.* a very good light is important ! You can only make a good job when you see all* the spry bottle with the windows cleaner again* a second, but Aqua dest, to remove rests from the windows cleaner* again the air pressure* ear cleaning sticks a pack, some little textils, paintbrushes, like that ..* a lot of time.the high voltage transformer is a very sensitive part, strictly forbidden to spray that with cleaning fluid or water .....

author: tautech
author_rank: Super Contributor
timestamp: January 21, 2015, 06:03:01 am
content: Quote from: coppice on January 21, 2015, 02:09:45 amI've been wondering that all day, and you could well be correct.Yes the D83 was somewhat different to other Telequipment models and might be Tek influenced.Shame that history is not on the net.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 21, 2015, 06:18:52 am
content: the high voltage card I have removed. Then spray the parts and behind with the windows cleaner. Dust water flows down in a pottthen brushing there, with old tooth brush, ear sticks and so on...then spraying again, with destillated water to remove the rest ...then drying with a hair dryer for tourists (600W only, warm , not hot)cleaning the high voltage card manually with ear sticks and so on.put it in the place,seeit becommes better.covering of water sensitive parts, here electrolytics with a paper case isolationat left down you see the long line of coils, the wholes there are all little C trimmers. The calibration of the delay line in Tek-Oldies is a job for insiders, very fine to have a friend who was long time in the Tek service.something to do before a Tek Oldie is finally cleangreetingsMartin

author: coppice
author_rank: Super Contributor
timestamp: January 21, 2015, 06:22:00 am
content: Quote from: tautech on January 21, 2015, 06:03:01 amThere's very little history of test equipment in general on the net. I've been getting nostalgic recently, and tried to find information about various things I used in my youth. I only find a few of them. There are models from HP and Tek which I used heavily, which I cannot find any mention of. Scopex was a British maker of budget scopes. I think they were started by people who left Tektronix/Telequipment. They made the world's first pocket scope with an LCD display, as they tried to move beyond making only entry level models. I can't find anything about that LCD scope on the web, although I found a couple of mentions of its existence. I find less record of pioneering products like that, than of more mundane improvements on older models.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 21, 2015, 06:29:12 am
content: very british is a little cossor scope,I would love to own one.See the page of Richard Sears, he is collecting themgreetingsMartin

author: coppice
author_rank: Super Contributor
timestamp: January 21, 2015, 06:48:32 am
content: Quote from: Martin.M on January 21, 2015, 06:29:12 amCossor was a very innovative company. They made the first dual beam oscilloscope in the 1930s. Its amazing how the real pioneers get forgotten. Nicolet pioneered digital oscilloscopes, but most engineers don't even know that name any more. It looks like you can still pick up some early Nicolet scopes cheaply.There used to be a lot more makers of oscilloscopes than there are now. Scopes from a number of Japanese companies often appear on this forum, but numerous old western makers are hardly mentioned. People like Racal, Advance, and Solartron/Schlumberger made a lot of scopes at one time.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 21, 2015, 07:11:09 am
content: I have written a lot here about my hobby, the restoring and care of old Tek scopesHope now you have enjoy to read that.Off Topic here.I have a pleasure to this community, special to the specialists of modern scopes.Year ago i buyed a Le Croy 9450, one of the large beautiful DSO with the amber screen of high resolution, for 50 euros ..this was own by a radio amateur, he have connected it to a tranceiver an destroy bot input converters what are the doorway from 1M input resistance to the 50 ohms of the system. This parts, named HHZ406, are obsolete. This are little cards, input modules, with something directly fired on the board, hybrids, not possible to repair that.In the LeCroy owners group of yahoo I found a instruction to rebuild that parts with smd`s, a engineer have made that.So I am searching for the help, to build for me 2 of this modules, so I can repair my beauty Le Croy. Of coarse I will pay that.This is the scope. The calibration failure comes from the bad modules, in 50 ohms it is allready working.the service manual is stored on my website,http://www.wellenkino.de/lecroy/service.pdfand the rebuild instruction is also there,http://www.wellenkino.de/lecroy/hhz.zipplease help methe required Teledyne Relais I have in stock.greetingsMartin/Offtopic

author: TerraHertz
author_rank: Super Contributor
timestamp: January 21, 2015, 09:13:56 am
content: Quote from: Martin.M on January 21, 2015, 06:01:14 amDefinitely! This is why my air compressor is next to the workshop door, and has a long hose.QuoteI thought so. The magic ingredient I lack is massive patience.One other question about cleaning valve gear. I only tried that once, and was discouraged by the fact that most of the tube numbers unexpectedly came off with the dust. How do you keep track of which goes where? Obviously, writing the numbers on with a felt pen isn't going to help, since the pen ink will clean off nearly as easily.Do you clean them one at a time, and re-write the part numbers (and socket location?) when finished each one?

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 21, 2015, 09:40:53 am
content: I clean tubes also with the windows cleaner, except the area where is the typing.The stamp will be cleaned carefully, dry.Removing all tubes from the scope.Get a styropor plate from junk and seperate fields, for each chassis part one, simply with a black pen.Then put the tubes in the plate exactly in the following they are sitting in the scope. So each tube will go back in its own place.greetingsMartin

author: coppice
author_rank: Super Contributor
timestamp: January 21, 2015, 09:43:23 am
content: Isn't it nice to have some active electronic components you can safely push into polystyrene?

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 21, 2015, 10:09:54 pm
content: tubes cannot have problems by electrostatic loads, they are made from glas + metal only.In Tek Oldies is important to put all tubes back in the own place, a swap will loose the calibration directly.Also you have to different if the tubes are normal ones (part no beginns with 154-) or Tek selected (part no begins with 157-).Something can be critical in swap, like a diffential input what needs urgend a best selected pair at the front.greetingsMartin

author: JacquesBBB
author_rank: Frequent Contributor
timestamp: January 21, 2015, 10:31:38 pm
content: Thanks a lot for showing the cleaning techniques.Especially the cleaning of the inside boards and components.Jacques

author: VK5RC
author_rank: Unknown
timestamp: January 22, 2015, 02:30:12 am
content: Thanks for the lovely pictures and also letting the forum know your techniques (and hard work) I wonder if a sticky topic under 'Repair' perhaps Restoration techniques for classic gear, would be worthwhile, I recall robrenz has also shared some really useful techniques.Do moderators do this?

author: tautech
author_rank: Super Contributor
timestamp: January 22, 2015, 03:49:00 am
content: Quote from: VK5RC on January 22, 2015, 02:30:12 amGood idea, but this is Martins thread and he might feel it's more appropriate in Test Equipment.You are so right, there is some wonderfull restoration examples, now hidden deep in the main boards.Yes a sticky would be a good idea and previous restoration threads could then be linked and the topic stated.Might I suggest Martin edits his Thread title to "VintageTektronix........" which might make it easier to find with the "search" function in the future.But I would suggest a new thread in General Chat to gauge interest/need/etc.VK5RClet this be you new callinghave a think how you can best sell it to the un-converted.I PM'ed a Moderator to get "Repair Doc's & Links" stuck in the repair board.

author: joeqsmith
author_rank: Super Contributor
timestamp: January 22, 2015, 03:50:07 am
content: Quote from: Martin.M on January 21, 2015, 07:11:09 amDid you join the forum in that README file? Has no one made boards for this?

author: TerraHertz
author_rank: Super Contributor
timestamp: January 22, 2015, 09:39:21 am
content: Quote from: Martin.M on January 21, 2015, 09:40:53 amOh of all the... why didn't I think of that? I actually do that with other things, including ICs (but with alfoil laid over the styrofoam.) For some reason, it never occurred to me for valves.Incidentally, PM sent about something else.

author: 22swg
author_rank: Frequent Contributor
timestamp: January 22, 2015, 09:57:41 am
content: Terra H Your not serious about Styrofoam and IC'seven with foil,, get some anti-static foam do the job properly .

author: coppice
author_rank: Super Contributor
timestamp: January 22, 2015, 10:14:31 am
content: Quote from: 22swg on January 22, 2015, 09:57:41 amHuge numbers of people use that aluminium foil over styofoam idea. I guess none of them ever look at the result, or think about the nature of the surface of aluminium in air, or they might notice a slight flaw.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 22, 2015, 12:25:21 pm
content: Quote from: coppice on January 22, 2015, 10:14:31 amThe surface of conventional foil is more than conductive. The Al2O3 layer is only a few nm, very easily scratched, and probably thin enough for current to tunnel through even if not punctured.That "nonstick" foil stuff I think is anodized, or some other sort of coating. And obviously not as suitable.I also had the experience with aluminum flashing from the hardware store... evidently, the common stuff is lacquered. D: So I had to sit there sanding down edges so I could foil-tape them together to build a ground plane, one day... (speaking of, aluminum foil tape is pretty good too; the adhesive itself isn't conductive, but it often gets poked through by crinkles, or you can curl edges under to present a metallic surface for probable contact).However, it's still not fool-proof. Although foil will absolutely drain away ESD, it will also support massive surge currents. The failure condition is: you bring your hand down to the foil, and POW, there goes the zap. All well and good, right? No: the huge peak current (>10A) causes voltage drop across the sheet, which can still zap things (at a lower voltage due to the low impedance of essentially a ground plane, but still with as much current capacity!). There's also the dV/dt of the event, which can couple into unlucky pins that aren't touching the foil at that moment.The trick to conductive foam is, the high resistivity may still support a spark, but the current is attenuated very quickly. Thus, foam can be more ESD resistant than solid metal.Dissipative materials (foam, baggies, tubes, etc.) are even less conductive, and generally do not support a spark at all. They are passably good insulators, which is the point: to insulate the contents from outside hazards, while still providing a leakage path (however slow) for the charge to dissipate (with a time constant of perhaps seconds or minutes, rather than micro to milli seconds). Parts mounted in these types of materials are still ESD sensitive, but thanks to the insulation, can't usually be stressed by it.Tim

author: SeanB
author_rank: Super Contributor
timestamp: January 22, 2015, 05:02:32 pm
content: Lucky for me by the sea that is not a problem. Trying to get a Van de Graaf generator running required both waiting for winter and using a room with air conditioning before it would even build up a small charge. Only places that have a big AC running all the time can have static charge build up, and that is expensive.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 24, 2015, 10:28:08 am
content: old Tek scopes on tourthe glowing Test place at a vintage radio forum meeting in germany, 2012...(with the strong order: when you start more then 3 of the large Tek at the same time they whill blow out the fuse ...)Classic Tek show in the radio museum bad laasphe, 2012the glowing Test place at the vintage radio forum + wellenkino community meeting in germany, 2014...there are always a very lot of friends of the 60`s who enjoy to see again this large old machines.Of coarse they are full working and can be used theregreetingsMartinp.s. it will be ok to move the tread to repairs or like that

author: TerraHertz
author_rank: Super Contributor
timestamp: January 24, 2015, 11:07:59 pm
content: Quote from: coppice on January 22, 2015, 10:14:31 amHuge numbers of people do, because it's fine. Plain kitchen foil does not oxidize enough to form any significant insulating layer, as a multimeter will prove. Also, people getting all hysterical about styrofoam's static properties are not actually thinking about how static charge builds up. It doesn't just appear out of nowhere, it takes friction between unlike surfaces to transfer charge. A sheet of styrofoam with a layer of alfoil against it, will quickly equalize charge in the styro via the alfoil. Then when you stick an IC into it, even if a pin makes no contact with the alfoil, where is any charge coming from? From the tiny volume of styrofoam under the foil, that the lead contacted? Rubbish. It was all already equalized.As for zapping from your finger to the foil layer, what, are you THAT bad with anti-static procedure? Why don't you just wear shoes and clothes that don't generate static in the first place, or touch something grounded *before* touching your styro sheets of ICs?And another reason a lot of people use styro slabs with foil for storing ICs, is that they are rigid, and you can write the part series numbers on the edge of the sheets in felt pen. Also the styrofoam is widely available for free. It's a very efficient and flexible system, and in my experience doesn't actually cause any static failures. I used to have most of my IC stock organized this way, but eventually migrated to a different system when the volume got too great for the 'stacks of styro sheets' method.There's a thread in here somewhere about IC storage methods, and I think I put some pics up.Edit to add: Those collector's meeting photos are wonderful. I wish there was something similar in Sydney. I don't know of any old test equipment museums or enthusiasts groups here. A few private old radios collectors, old steam machinery groups, but test equipment? Nothing? Anyone know of any?

author: c4757p
author_rank: Super Contributor
timestamp: January 24, 2015, 11:14:31 pm
content: Quote from: TerraHertz on January 24, 2015, 11:07:59 pm+1or +100If you're a hamfist who walks across the room in the winter, picks up enough static charge to stun a rhino, and then dives for a bunch of ICs, well then yeah, you really need top-quality antistatic materials. But if you do that, you're a bit of a dolt, really. Discharge yourself!

author: Smith
author_rank: Frequent Contributor
timestamp: January 25, 2015, 09:39:31 am
content: Just helped someone repair an old tek 422 that wasn't used for years. One of the nuvistor tubes was broken, so we used a fet to replace both. We really liked the build quality. We cleaned it up and it was looking brandnew. Too bad I didn't take any pictures.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 25, 2015, 09:47:56 am
content: simply replace the nuvistor, they are still to get.And yes, 422 is a very useful scope.greetingsMartin

author: radiomog
author_rank: Regular Contributor
timestamp: January 25, 2015, 09:51:25 am
content: Beautiful work Martin!>insert a "sex on a stick" quote here<

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 26, 2015, 09:57:31 pm
content: some people think the old scopes are slowly.They use plugins, it`s the old laboratory class.The most sensitive Inputs are 1A7A differential input plugins, they provide 10µV/cm with a fine s/n.The fastest warm inputs are Inputs Type "N", sampling more then 1GHzThe fastest spectrum analyzer plugins are 1L40, the provide at maximum 40GHz on 500 Series tube scopesThe 1L5 spextrum analyzer plugin provides full audio analysis from 50Hz upThe 1S2 Plugin works as UHF TDRTek549 accept all of them and provide storage by the CRT.But something can be wrong.... so a triple nickel will accept this high tech plugins also, that works. But this scope is so much hot inside that the temperatur sensitive germanium transistors in the extremly fast plugins can be grilled by the scope, so we will not plug in them in a 555. Other scopes like the 556, all 53x and 54x will do that perfect.Another thing is the sweep voltage, the oldies have mostly 150V, but some of them only 100V. So spectrum analyzer plugins have a switch at backside to selet the sweep voltage. Also, in the 547, 549 and 556 the sawtooth is connected in the slot and plugins can read it from there, all older scopes must feed the sawtooth by external wire in the front of the plugin to use it.In the 56x scopes, they use smaller plugins , "3-" series, is the complete vertical amplifier a part of the plugin. This means, you calibrate this plugin personally to its scope ! In another scope plugged the calibration will be lost.The larger 1- Series plugins have no problem to be swapped bec. the input sensitivity of the slot will be calibrated. Only the verticaL POS in Dual Beam Scopes maybe the plugin must be corrected by screw driver from the front when you swap an upper beam with a lower beam slot.greetingsMartin

author: TerraHertz
author_rank: Super Contributor
timestamp: February 13, 2015, 08:36:21 am
content: I thought I'd bump this thread, by posting pics of my one and only representative piece of gear from that era. A Tektronix 3B3 timebase plugin, that I gather goes with the 500 series scopes. I don't know if it works, I just have it for display case purposes. I was fortunate to get it with the original cardboard protective sheath.

author: Martin.M
author_rank: Frequent Contributor
timestamp: February 22, 2015, 08:21:31 am
content: my actually project:1S1 Sampling plugin, reads up to 1GHz in any 500 Series Plugin Tek with the lage slots.I am searching for the both tubes, they are missing. Audiophools made it possible to pay more then 100 Dollars for a pair...Have a special look to the input plug, its a General Radio. The little box behind is the diode mixer.1S1 works with 2 tubes, 1 Nuvistor and a lot of old & cold Tek voodooThe min. rise time is given to 350 picoseconds ( 1969! )This unit includes vertical, horinzontal and triggering management in one. The scope is used as psu and display only, so the bandwith is not relevant. The amplitude will be drawed as ine of little points, a typical sampling scope work.The katalog price 1969 was 1.275 us$, enough for a small car. One GHz is still expensive today. Oldies can help at home to read that alsogreetingsMartin

author: Gixy
author_rank: Regular Contributor
timestamp: February 22, 2015, 04:41:36 pm
content: May be of intererest for you guys, a complete batch of vintage instruments for 1000€:http://www.leboncoin.fr/collection/770150714.htm?ca=16_s

author: dom0
author_rank: Super Contributor
timestamp: February 22, 2015, 05:00:08 pm
content: Sounds like a reasonable price for the six large Teks (not counting the other stuff) plus scope-mobile.

author: Electro Fan
author_rank: Super Contributor
timestamp: February 22, 2015, 05:02:16 pm
content: Quote from: Gixy on February 22, 2015, 04:41:36 pmTranslationDescription:Following the death of my father, well-known audio equipment manufacturer and collector, I part of a large set of radio measurement devices tsf hi-fi elders. In total, more than a hundred pieces from the 30s to 70s:-Oscillos Tektronix ref: 585A (with cart), 545,585A, 549,515A, 666,524AD-Metrix: Tilt 201C (x2), marker 901, generator 936 B, 746A voltohmmetre, scope 1010 930D ??generator GX303A generator.-Ferisol: CF110 generator (x2), Q meter 803A, L305 generator.-Bruel And Koer: Heat frequency oscillator types 1014, same-type 1013, voltmeter heterodyne-type 2005 microphone amplifier Type 2603 / B, level recorder like 2306. Many other devices Bruel and Koer not listed.-General Radio: distortionmeter 1932A, signal genera tor 805C, Impedance bridge 650A, 603A signal generator, test signal generator 604 types.-Philips: Tube tester Cartomatic 1 and 3.AME: Amplifier heterodyne-type 1180Trub Tauber (Zurich): important set of voltmeters / mV / ammeters / power meters calibrated wooden boxes (30 years)The devices are mostly in good presentation but not tested. I do not guarantee the operation.The above list is far from exhaustive. There are especially many oscilloscope and lampemetres. Which is not listed or is to be seen photographed on location in the Val d'Oise.The set can be divided into several lots but I will not sell to the unit.First contact by email, thank you.

author: Martin.M
author_rank: Frequent Contributor
timestamp: February 22, 2015, 07:14:42 pm
content: Tek have not build a Type 666, there must be a mistake.greetingsMartin

author: chrisstra84
author_rank: Contributor
timestamp: February 26, 2015, 08:21:19 pm
content: Here are some pictures of my Telequipment S51B…Christian

author: rx8pilot
author_rank: Super Contributor
timestamp: February 26, 2015, 08:55:11 pm
content: I saw this gem today.....I could not find the USB or Ethernet port for firmware updates. Must have been an option.

author: macboy
author_rank: Super Contributor
timestamp: February 26, 2015, 09:07:43 pm
content: Quote from: rx8pilot on February 26, 2015, 08:55:11 pmNo, it probably uses online updates over wireless... Try sliding from the bottom of the screen up, to bring up the Wifi setup menu.

author: Tallie
author_rank: Regular Contributor
timestamp: February 27, 2015, 05:46:27 am
content: Great thread. These old machines are works of art...

author: Deathwish
author_rank: Unknown
timestamp: June 05, 2015, 08:08:55 pm
content: Quote from: Tallie on February 27, 2015, 05:46:27 amHmm, at least they dont need glasses, zimmerframes or wobble when they work.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: June 05, 2015, 11:02:11 pm
content: My RM503, fully restored, showing a slow sweep with its nice persistent blue-green phosphor.This scope had a fault in the main transformer, the elevated HV from the CRT filament winding was leaking to other windings and it was blowing fuses and wouldn't show a trace. So after a long time thinking about it, I simply disconnected the filament winding, installed a separate transformer in the case to handle the filament supply and its HV elevation. And it works perfectly!

author: TimFox
author_rank: Super Contributor
timestamp: June 06, 2015, 04:59:17 pm
content: I noticed lots of plastic-cased axial-lead capacitors in the tubed Tektronix units.When restoring a Tek 130 L,C meter, I found that all of those capacitors had gone bad, presumably from absorbed humidity, so I replaced them with equivalent modern polypropylene units. Did you have similar problems? With the CRO's higher interior temperature, it's possible that humidity did not rear its ugly head.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: June 06, 2015, 07:13:07 pm
content: Quote from: TimFox on June 06, 2015, 04:59:17 pmI did replace one of the big can dual capacitors in the power supply, but that's all. The scope calibrated easily to spec, so as long as it keeps working so well, I'm not going to mess with it further.The scope originally came to me from a NASA Ames surplus property auction, and then it spent at least two years sitting in an unheated concrete building on Alameda Island in the San Francisco bay. So it's had plenty of opportunity to suck up humidity. In spite of that, it keeps on keeping on! These days I only use it as a room heater in winter, playing Lissajous patterns from 4 oscillators in x-y mode. (The horizontal and vertical amplifiers are identical and each has two inputs, inverting and noninverting.)

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 07, 2015, 07:47:58 am
content: hello friends, I am backNow see a old glowing Tek what can sniff in the UHF area.Tektronix Type 564 storage oscilloscope, equipped with sampling unit plugins.The setup is this:Tek 564scope mobile 201 "D" with plugin housingplugin 3B3 time baseplugin 3B4 time baseplugin 2A61 high sensitive differetial input plugin what reads from 10µV/divplugin 3A6 (have 2 pcs) normal input plugin, have 2 to use the second for XY operation.plugin 3T2 sampling sweep, this is a very special time base for using sampling systemplugin 3S2 is a dual channel sampling input plugin with 2 slots for sampling headssampling head s1sampling head s2sampling head s3 the complete set including attenuatorssampling head s4 (have a rise time of smaller then 25 picoseconds)about 56x series from Tek: this scopes have no own deflection amplifiers, they are part of the plugins ! So when you own more the one of them, you have to decide by every plugin you have there which of your 56x scopes is the owner of that bec. the plugin have to be calibrated to work with the CRT.pick up: a good loadet car...Sampling head S3 complete set, and the S2some of the pluginshere is the 2A61 Diff, I need urgend the plug for that, a Bendix 8-4 male.And the sampling unit including 2 of the heads...the 564 inside.the scope was in a smokers laboratory of Telefunkenthe Restoration, washing...a new old 564?Plugins.a dirty scope mobile, washingAnd here is the TekA special look inside the 2A61...the large can is a coupling C, used for the lowest frequency of 0,06Hz... Tek have placed a bipolar 20.000µF/3V. In the both blue metal cases are selected pairs of nuvistor tube. The litte fram is soft mounted with rubber to reduce microphonic effects from the case.A highlight of the old engineersgreetingsMartin

author: tautech
author_rank: Super Contributor
timestamp: November 07, 2015, 09:28:35 am
content: Quote from: Martin.M on November 07, 2015, 07:47:58 amIt always gets me worried when you are so long absent.Quote.

author: med6753
author_rank: Super Contributor
timestamp: November 07, 2015, 09:47:52 am
content: How did I miss this thread? Fantastic!

author: dom0
author_rank: Super Contributor
timestamp: November 07, 2015, 10:57:32 am
content: What are those three metal cans that look like a massively enlarged HC-49/u crystal?

author: Howardlong
author_rank: Super Contributor
timestamp: November 07, 2015, 11:12:48 am
content: Quote from: dom0 on November 07, 2015, 10:57:32 amHip flask?Also what are those two blue things just below?As always, some gorgeous retro nerd porn, thank you.

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 07, 2015, 11:40:17 am
content: Quote from: dom0 on November 07, 2015, 10:57:32 amTek-Caps. Mostly 2 or 3 Caps in a common case, Tek made them also self.The quality of them is timeless, I never found a defect one.greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 07, 2015, 12:27:10 pm
content: Quote from: Howardlong on November 07, 2015, 11:12:48 amIn each of this cases are 2 nuvistor triodes, a selected pair. In that case they are thermal coupled to have always the same temperatur.This pairs are the the high sensitive input stages of the differential amplifier. That is made so complicated in respect to a very low offset.The both cases are mounted on a small sheet what is soft mounted, hanging in rubbers, to reduce microphonic effect from any vibrations of the case.The little tubes inside handle µVolts on the gates, with extremly low noise.greetingsMartin

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 07, 2015, 12:53:53 pm
content: Martin.MYou sure know your way around these old scopes. Beautiful work.What do you do about tubes? As far as cleaning them. I work on lots of vintage stuff and the silk screening on the tubes rub off without using cleaner.Anyway, keep the outstanding work coming

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 07, 2015, 01:58:55 pm
content: I clean tubes also with windows cleaning fluid, except the printed area, this only dry, without pressure.When the printing on a tube is removed I will not reprint that, important is the tube is original and allready working.

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 08, 2015, 06:12:53 pm
content: from 1973 to 1987 was the µTek timethe most often problem of this little scopes:But they are made without smd parts, it`s possible to make some restoration...Tek 214 storage oscilloscope.2 channels, .5mc , and a storage CRT inside.Restoration: 2 battery packs, recharchable each with 5 cells of AA size, all in all = 12V,cleaning , complete adjust and calibration of all, special the storage part what was far away from useful.This little Tek is now full working.The new family picture from the out of house service teamgreetingsMartin

author: FlyingHacker
author_rank: Frequent Contributor
timestamp: November 08, 2015, 11:17:31 pm
content: Love the vintage Tek! The uTek is way cool.I am in the process or restoring a 564 myself. I am about to place an order for some caps. It generally work well already, but has some ripple I need to quell.

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 08, 2015, 11:50:24 pm
content: I love it, great job, very cool!

author: AF6LJ
author_rank: Unknown
timestamp: November 09, 2015, 12:42:51 am
content: WoW, Just WoW...Thank you Martin and everyone who shared.Great way to spend a Sunday Afternoon.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 09, 2015, 12:51:01 am
content: Quote from: AF6LJ on November 09, 2015, 12:42:51 amWell Said Sue, and always good to see you here!His restores are awesome.

author: AF6LJ
author_rank: Unknown
timestamp: November 09, 2015, 03:56:08 am
content: Quote from: Radio Tech on November 09, 2015, 12:51:01 amThey are Great!!There is a guy here in town who has a number of Tek scopes including a 585 that was wonderfully restored.

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 09, 2015, 04:36:34 am
content: Quote from: AF6LJ on November 09, 2015, 03:56:08 amI would love to see a photo of that

author: AF6LJ
author_rank: Unknown
timestamp: November 09, 2015, 05:06:40 am
content: Quote from: crispy_tofu on November 09, 2015, 04:36:34 amHe shows up at the local ham swap meets I may have a picture of his gear.EDIT:I Thought I had a good picture but the ones I have are not that great.He had several scopes and they were reasonably priced.

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 10, 2015, 04:53:10 pm
content: ( off topic) Sue is a HAM?one of this people who use some very glowing boatanchors to heat long antennas ?I have there a restoration running just in the moment. See below, this old american worst case radio makes me bumping the head on the tablegreetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 10, 2015, 07:13:06 pm
content: comming soon: Restoration of a Rackmount scope Tek RM565 (Dual Beam)this is a very heavy Tek.It have special differents to the other scopes of the 56x series.Normally they have a slot for the vertical amplifier and a slot for the time base, horizontal amplifier. This makes possible to use various time bases, and very special sampling sweep time bases for driving the sampling plugins. The 565, RM565 have own time bases, there is no slot to use another. There are only 2 slots (for each beam one), to insert vertical input plugins. So the large 565 can`t use time base plugins.greetingsMartin

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 10, 2015, 07:16:15 pm
content: Martin.M you are just awesome!I love seeing you bring these oldies back to lifeYou should do videos.

author: nfmax
author_rank: Super Contributor
timestamp: November 10, 2015, 08:03:14 pm
content: Quote from: Radio Tech on November 10, 2015, 07:16:15 pmThey would have to be 16mm movies though, wouldn't they?

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 10, 2015, 08:05:28 pm
content: Quote from: nfmax on November 10, 2015, 08:03:14 pmHe He. you got it. And silent...

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 10, 2015, 10:25:40 pm
content: I have a bw video camera using a newicon tube, you means that?greetingsMartin

author: Richard Crowley
author_rank: Super Contributor
timestamp: November 10, 2015, 11:15:14 pm
content: Quote from: Martin.M on November 10, 2015, 10:25:40 pmDo you mean a Newvicon (descendent of the original Vidicon)?https://en.wikipedia.org/wiki/Video_camera_tube#NewviconI once had the job of maintaining a couple of big, heavy Phillips/Norelco studio color TV cameras.Each had three Plumbicon tubes (one for each additive primary Red, Green, Blue)Each camera had a Camera Control Unit consisting of a short rack with >>100 adjustment knobs.It took an hour or two to align the camera for use each time you powered it up.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 10, 2015, 11:16:25 pm
content: That would be interesting

author: AF6LJ
author_rank: Unknown
timestamp: November 11, 2015, 03:13:08 am
content: Quote from: Martin.M on November 10, 2015, 04:53:10 pmYes, and I love radios that glow in the dark.Even more; I love old test equipment and the things engineers had to do to push the envelope. Before I lost part of my eyesight I owned quite a bit of old warm gear, I had tn HP 851/8551 spectrum analyzer, it was most interesting to see just how they did the stabilization of the BWO frequency. I had that, a calermetric power meter, several sig gens from audio to twelve GHZ, and a bunch of other stuff. Long story about the HP SA... I have told that story here once before....The amateur gear is easy to deal with, not like tracking down screwy problems in old test gear. The amateur gear is easy to fix and fun to operate, I refer to it as Full Contact Amateur Radio.Dace needs to set up an amateur radio sub-forum here. This group has a lot of hams and is a more polite place than QRZ.

author: AF6LJ
author_rank: Unknown
timestamp: November 11, 2015, 03:14:46 am
content: Quote from: Martin.M on November 10, 2015, 04:53:10 pmI should point out I almost recognize that looks like an Lafayette or an Eico from the rear.

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 11, 2015, 04:12:12 pm
content: an old Eico, 753 + the PSU 751I have some other nice radios also. Most amazing is the Collins Radio 51j4greetingsMartin

author: AF6LJ
author_rank: Unknown
timestamp: November 11, 2015, 04:22:04 pm
content: Quote from: Martin.M on November 11, 2015, 04:12:12 pmI thought it was an Eico the funny shaped VFO housing gives it away.As for the 51J4

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 11, 2015, 05:10:50 pm
content: the adjusting of the slugs is not possible in one sunday afternoonThis radio is one with the 3 mechanical filters, 1 - 3 and 6kHz. It moves at minimum 15 slugs in the gear train.A very good test field area for old Tek scopes

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 11, 2015, 05:29:17 pm
content: Beautiful!

author: retrolefty
author_rank: Super Contributor
timestamp: November 11, 2015, 06:05:17 pm
content: Quote+1WA6TKD

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 11, 2015, 06:19:11 pm
content: Quote from: retrolefty on November 11, 2015, 06:05:17 pm+2

author: AF6LJ
author_rank: Unknown
timestamp: November 11, 2015, 10:30:44 pm
content: Quote from: Radio Tech on November 11, 2015, 06:19:11 pm

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 12, 2015, 12:34:04 am
content: Was thinking, I know that is dangerous.But really does not have to be a ham radio sub forum. But perhaps a RF Engineers Electronics sub forum.RFEE for short

author: retrolefty
author_rank: Super Contributor
timestamp: November 12, 2015, 02:59:47 am
content: Quote from: Radio Tech on November 12, 2015, 12:34:04 am"A rose by any other name would smell as sweet".Just so it's a place where we can 73s, 88s, hi hi hi, CQ, and a minimum of QRM

author: AlxDroidDev
author_rank: Frequent Contributor
timestamp: November 12, 2015, 05:44:24 am
content: This is what I call "vintage porn"! I love seeing these equipaments being very well cared for. Thank you for sharing and congratulations on the great job.

author: DG5SAY
author_rank: Contributor
timestamp: November 12, 2015, 07:16:00 am
content: Quote from: AF6LJ on November 11, 2015, 10:30:44 pm+1

author: tautech
author_rank: Super Contributor
timestamp: November 12, 2015, 07:21:57 am
content: Quote from: DG5SAY on November 12, 2015, 07:16:00 amYep. we knew this was a great thread months ago and linked to it in this sticky started byVK5RC:https://www.eevblog.com/forum/repair/vintageclassic-renovation-techniques/

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 14, 2015, 06:29:24 am
content: About graticules on old Tek scopes.There are 2 different styles:1.) graticule field includet in the front of the CRT2.) a plexi glas what have inside the graticules, in front of the CRT screen.On some pictures here you have seen red colored graticule fields. This are scopes at 2.).The graticueles glass have holes up an d down, you can`t see them bec. they are covered from the bezel front plate.In upside are 2 bulbs what do the graticules illumination, the heads of them are exactly placed in this holes of the glas.The graticules glas have that holes in upside, also in downside. The both holes in downside are inside painted transparent red ! So, when you turn the glas to have that holes upside, the old Tek will display a red graticules field, not turned a whiteTo order spare bulbs to repair a Classic Tek look for bayonette bulbs 6.3V 0,3A GE#47greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 16, 2015, 05:36:02 pm
content: Systron Donner 6053, a 3GHz Nixie Counter...Restoration starts

author: tautech
author_rank: Super Contributor
timestamp: November 17, 2015, 05:40:13 am
content: Quote from: Martin.M on November 16, 2015, 05:36:02 pmMartin, there is a Nixie thread:https://www.eevblog.com/forum/reviews/lets-see-your-nixie-tube-equipment/

author: VK5RC
author_rank: Unknown
timestamp: November 17, 2015, 07:39:05 am
content: Ooooooh, I like the Nixie Freq Counter, robrenz has done some excellent aluminium frame restoration on an old HP if you haven't seen it beforehttps://www.eevblog.com/forum/testgear/hp-3410a-ac-microvoltmeter-restoration/msg433969/#msg433969,but you two guys are setting the high standard for Vintage repair!!

author: Martin.M
author_rank: Frequent Contributor
timestamp: March 25, 2016, 04:59:16 pm
content: The next restoration will start: this is a Tek 181 Time Mark Generator.It works with a crystal and 20 tubes.greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: April 02, 2016, 10:19:20 am
content: The restoration is done.2 tubes and a electrolytic was changed to become a good working condition.

author: AF6LJ
author_rank: Unknown
timestamp: April 02, 2016, 02:42:36 pm
content: Looks really good.

author: med6753
author_rank: Super Contributor
timestamp: April 02, 2016, 04:26:01 pm
content: Every time I look at this thread I start drooling because my mouth is wide open in amazement.I love the smell of hot vacuum tubes in the morning.

author: Martin.M
author_rank: Frequent Contributor
timestamp: April 02, 2016, 05:21:30 pm
content: thank you.This very glowing apparatus is only 60 years old and works very accurate,means that is good for along time againTime Mark Generators have a crystal. In following are some stages of tube mono flop where the hold time is set to 9 clocks, so the output of each of them is always f/10.They are very useful to calibrate Time Bases in analog test equipment, scopes.greetingsMartin

author: med6753
author_rank: Super Contributor
timestamp: April 02, 2016, 05:49:07 pm
content: Quote from: Martin.M on April 02, 2016, 05:21:30 pmAbsolutely! I've used Type 535's, 545's, and 547's in a production test environments and those scopes had thousands of hours on them and still worked well. Anyone who says vacuum tubes are unreliable don't know vintage Tek. Once a year calibration check and they were good to go.I did own a Type 561S (Special version of a 561A) but due to some unfortunate circumstances I no longer have it. One of these days I'm going to get myself another boat anchor. I even have a copy of Stan Griffiths book "Oscilloscopes - Selecting and Restoring a Classic".

author: Martin.M
author_rank: Frequent Contributor
timestamp: April 03, 2016, 07:42:00 pm
content: I would like to have a 547.This ist the Tek with the most plugs on the frontIt have the internal wiring in the slot to feed spectrum analyzer plugins with the sawtooht. There is only 3 Tek what provide that:the 549 storage, the 547 (may include the low cost 546) and the heavy 556 Dual Beam.All others have to use a cable to feed the plugin external with the the sawtooth from the scope at the banana plug in front.Also there is to select at the rear from the spec if the sawtooth is a 100V or a 150V amplitude. This is various by Type, 547, 549 and 556 deliver 100V, 551, 535 and a lot of others 150V.greetingsMartin

author: Curtis
author_rank: Contributor
timestamp: April 20, 2016, 08:30:08 pm
content: I have a around 1965 Tek 422 scope where channel two is not working. I read that the 8056 nuvistor was probably bad. I took the scope apart and it looks like the scope I have does not use a 8056 nuvistor tube, but a FET. Can anyone tell me what replacement FET number this would be, and if this could be the problem?

author: Martin.M
author_rank: Frequent Contributor
timestamp: April 26, 2016, 04:15:37 pm
content: if your 422 is the newer version, serial No higher then 20.000 there is a Dual Fet , Tek part No 151-1011 to replace by a 2N3822if your 422 is the older version, serial No < then 20.000 and the Nuvistor is replaced by a Fet use a MPF102 to repair the scopeVerify that the Fet is the problem by swapping with CH1greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: April 26, 2016, 04:24:38 pm
content: Quote from: med6753 on April 02, 2016, 04:26:01 pmIf you need smile again look at my website, in the little forum,our friend from johannesburg made "a little walk in the garden" (with some very large scopes and scope mobiles... I think there is a 547, a549 and some others, see the picture)greetingsMartin

author: fernando_roque
author_rank: Newbie
timestamp: May 19, 2016, 04:55:46 pm
content: Good afternoon!I have a Oscilloscope Tektronix type 454 but the high power transformer that have to deliver 12KV to the CRT no longer deliver that amount of voltage. I need another transformer for it! Can you help me in that? i don't know if you have one for it that you may sell to me or if you know someone that can help me in that. Its not an easy part to find.I apreciate your help!Best regards,Fernando Roque,radio amateur class 1 with call sign : CT7ABIhttps://qrz.com/db/ct7abi

author: fernando_roque
author_rank: Newbie
timestamp: May 19, 2016, 05:08:51 pm
content: Quote from: valvedoctor on January 18, 2015, 10:10:32 pmGood afternoon!I have a Oscilloscope Tektronix type 454 but the high voltage transformer that have to deliver 12KV to the CRT no longer deliver that amount of voltage. I need another transformer for it! Can you or someone here in the forum help me in that? i don't know if you have one for it that you may sell to me or if you know someone that can help me in that. Its not an easy part to find.I apreciate your help!Best regards,Fernando Roque,radio amateur class 1 with call sign : CT7ABIhttps://qrz.com/db/ct7abi

author: Martin.M
author_rank: Frequent Contributor
timestamp: May 19, 2016, 06:40:52 pm
content: hello Fernando,please check first the C behind the HV rectifier if that is allready working ( a 500pF or like that, doorknob).Sometimes they have a failed isolation and the HV goes down.Also the rectifier self (is there soldet tube 5642?) is to check.For spare part, I have send you a pm including the links.greetingsMartin

author: fernando_roque
author_rank: Newbie
timestamp: May 19, 2016, 09:24:46 pm
content: Thanks so much for your reply my friend and thanks for all that aloud my participation here in this forum.I already mesure all the cap behind the transformer and also the diodes and it seems all ok. Diodes also maintain their polarity. I know that sometimes this does not mean anything. A caps can be all ok in measured capacitance but still a cap can be damaged. But until now nothing proof that i am wrong regardless to the transformer. I will talk with the people of that sites u sent me. Even if the problem is not from the transformer at least i will be with 2 transformers and then i will change all that caps behind the transformer just to be sure that all will be ok.I will be in touch with you here in this site my friend and once more thanks for your help.I will keep in touch,Thanks and have a nice night,Fernando Roque, class 1 radio amateur with call sign CT7ABI

author: Martin.M
author_rank: Frequent Contributor
timestamp: May 30, 2016, 07:01:34 pm
content: The Makerfaire in Hannover, yesterdaygreetingsMartin

author: alsetalokin4017
author_rank: Super Contributor
timestamp: May 30, 2016, 07:52:31 pm
content: I love my old Tek RM503 "precision low-frequency oscilloscope".This scope has an interesting history. It was bought at a surplus auction from a NASA Ames laboratory 20 or so years ago. I cleaned and restored it internally and calibrated it, left it on overnight to "burn in" and in the morning found that it had failed, no trace and was blowing the mains fuse. I did a lot of troubleshooting over the next several years here and there, and eventually found that the CRT filament supply winding, which is raised to -2kV or so by the HV circuit, was shorting to the primary winding inside the big main power supply transformer. Obviously this wasn't going to be replaced... so what to do. I finally figured out that I could simply provide a separate transformer for the CRT filament circuit altogether. Once I figured out the fix, the hardest part was finding room inside the chassis for the new filament transformer. Now the scope works perfectly again. I love the blue persistent phosphor and the orange-red graticule.I mostly use the scope in X-Y mode, although the timebase works perfectly. I really like the dual inputs (inverting and noninverting) to each amplifier and the symmetrical V and H amplifier construction. It also helps keep my room warm in winter !

author: med6753
author_rank: Super Contributor
timestamp: May 31, 2016, 01:20:08 am
content: Quote from: alsetalokin4017 on May 30, 2016, 07:52:31 pmThis is a fairly common fail in vintage 500 series scopes. I had it happen on a 561S scope and Martin has seen it too. It can be traced back to the design of the CRT circuit. The cathode in the CRT is sitting at about -2KV while the filament that heats the cathode is at 6.3VAC. And they are very close together within the CRT gun assembly. To prevent internal arcing the filament is raised to near cathode potential thru a resistor. So while the filament "sees" 6.3VAC the wiring, and the filament winding in the main power transformer, see nearly -2KV to chassis. Over time this may cause the power transformer to arc over internally. And as you discovered the best solution is mount a separate filament transformer within the chassis. But you have to make sure it has a high insulation resistance or it may arc over eventually too.

author: Martin.M
author_rank: Frequent Contributor
timestamp: June 04, 2016, 08:57:41 pm
content: here is the english report from the last weekendhttp://makezine.com/2016/06/01/hundreds-makers-hannover/greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: June 22, 2016, 04:41:32 pm
content: to use american test gear in germany you have to transform the 230V into US Plugs.this is my uncle sam. It provides 2.5 kVA(to handle by two persons)

author: helius
author_rank: Super Contributor
timestamp: June 22, 2016, 09:54:29 pm
content: now that looks like a wonderful trafo, Martin.but it isn't a motor-generator set; do the scopes you use work ok on 50 Hz?

author: tautech
author_rank: Super Contributor
timestamp: June 22, 2016, 10:30:29 pm
content: Quote from: helius on June 22, 2016, 09:54:29 pmIt was common for even old scopes to function with mains supplies of up to 400Hz.

author: helius
author_rank: Super Contributor
timestamp: June 22, 2016, 11:50:05 pm
content: That's not what I asked. Running a transformer at a higher frequency makes it less efficient, producing higher losses in the core and windings. But running it at a lower frequency can lead it into saturation, which is more serious.

author: vk6zgo
author_rank: Super Contributor
timestamp: June 23, 2016, 05:21:37 am
content: Quote from: helius on June 22, 2016, 11:50:05 pmTektronix Oscilloscopes had a lot of iron in their transformers & they were built to be used anywhere in the world,so it is most unlikely to be a problem.

author: coppice
author_rank: Super Contributor
timestamp: June 23, 2016, 10:09:25 am
content: Quote from: Martin.M on June 22, 2016, 04:41:32 pmWhat American test gear do you have that lacks a 110V-230V selector or universal input? The only things I've seen like that are products very much tailored to US only needs, like telephone test equipment that only supports US telephony standards.

author: VK5RC
author_rank: Unknown
timestamp: June 23, 2016, 10:11:41 am
content: Hi Martin et al,I thought I would post a picture of my 453 repair inspired by you guys. It is displaying a 10MHz GPSDO signal.

author: etienne51
author_rank: Contributor
timestamp: June 23, 2016, 10:14:35 am
content: Quote from: coppice on June 23, 2016, 10:09:25 amJust an example, I know the EICO 1030 regulated HV power supply only has 110V primary winding, no way to switch to 230V easily.

author: etienne51
author_rank: Contributor
timestamp: June 23, 2016, 04:57:31 pm
content: Just like VK5RC, I was inspired by people restauring old Tek scopes. Among them, Martin.M here. So thanks a lot to him and everyone for sharing their nice work and all the details!*Moar glowy electronics*Hope you don't mind me sharing my story, and a few*that's a lie*pics here in your thread... A year ago I got a 2465B which quickly became my main oscilloscope. It was in printine condition, and worked just fine. That was before I had any interest in vintage vacuum tube scopes. I was trying to build all the circuitry necessary to drive small CRT tubes, and also some nice stuff like scope clocks. I really needed anawesomeanalog oscilloscope, and this was the one.(All the pics are limited in size, and can be clicked to get the full size.)I opened it up the day I received it, and I noticed some electrolytic caps that were already replaced. The Dallas DS1225 memory was also replaced, so it seems like this unit is bullet proof for many years coming! I spotted some cracked, but not yet damaged, X2 caps in the PSU board though, which I did not replace right away. Maybe I should have... one of them blew up a few months later! No harm done, I replaced them all, thanks to another thread on EEVBlog with many details about this scope.(There were a few others that I replaced too,thisandthese.)Apart from that, everything was so clean it could have been a brand new unit. So, this was not a restauration project.More recently, last week, I finally got my very first vacuum tube oscilloscope, a Tektronix 310A, with the plastic handle and BNC connectors, compared to some others with a leather handle (that does not age really well, actually) and UHF connectors. I got this one on eBay US, imported all the way to Reunion Island (where I live). It was really dusty, that was to be expected. I won't go too much over the details about the cleaning process, but basically, the first thing I did was removing as much dust as I could using a vacuum cleaner and a soft paint brush. Then, I had to rewire the transformer for 234V operation.(Fortunately, the silver solder spool was there at the back.)This scope was advertised as working, with a pic showing a trace on the CRT. So I replaced the fuse at the back with a 800mA slow blow, and I give it a shot. Success, it worked!Time to get to the real cleaning now. I did not take any pics of before, this is the only one I have. It looks quite a bit dirty, but it was a lot worse inside.(This was taken by the package forwarding company.)So, I took the unit apart, removed all the panels, the CRT and shield, all the parts of the frame that could be removed (except the panel where the AC outlet is, because I would have to desolder the fuse and mains connector). I also removed all the front and rear knobs. I washed all that using running water, soap, a plastic brush and an old toothbrush for the small parts. It tool multiple passes to get everything perfectly clean. I also used alcool for some panels and a paintbrush, but I had to be really careful with that, since it could easily remove the writings. I also removed the rear hinge which was matte and yellowish.(This one was hard to clean, but here it is, nice and shiny!)Like I said before, the handle on the model I got, aged pretty well, unlike the leather one. I polished the supports on the sides.(On the top right, I couldn't clean this since the adjustable caps are soldered in place...)Then I removed the tubes one by one, and cleaned them with water, and just my bare fingers, no brush or anything since it's not needed, and the writings were so easily removed. I cleaned some components inside, but it's not done yet. I'm not sure how to clean all the components, since there is not much room for a brush or anything. It will be fine for now, I'll see if I can do better a bit later.(This side is almost completely cleaned up, except for the turret assemblies which I didn't touch at all.)(The other side. It's slightly better now, I did not take another pic though.)The inside, were not too dirty, I just used the vacuum cleaner again, and tried to wipe as much dust as I could with a brush. I can definately do better than that, but it's going to be tricky... One thing that needs to be done, is cleaning up the contacts of the turret switch that sets the Volts/Div. It's quite touchy and a bit hard to set right.(I'd say it looks pretty clean on the pic.)So, that's about it. Now I need to calibrate it. That's going to be hard, since it seems like some pots are acting a bit strangely.Everything else seems to work just fine. The CRT is terrificly precise! (Can't really see that on the pics, sadly.)(Here it is, displaying the output of the calibrator. The right backlight bulb is dead.)Just a few more pics...(This is it, after complete cleanup of the outside. I need the fourth graticule nut.)(Side view.)(Bottom view.)(And rear view. I really need a 234V tag, and two feet.)And to end this, some artistic pics of glowin' tubes.There are some more full size pics, onFlickrorDropbox.

author: Martin.M
author_rank: Frequent Contributor
timestamp: June 23, 2016, 07:51:29 pm
content: boah, you opened the shutter from the camera for a long time to make that so much glowingAbout the bulb in the graticule illum ofclassic Tek scopes: this is a GE#47 bayonett socket lamp (not a #25!)When yo look exactly you will see that a #47 have very long holding wires inside to have the tungsten what is lightning directly upside in the glas dome.This is useful bec. the bulb is mounted to bring the light from the side in the plexi glas with the graticule. Is there another bulb the tungsten is behind the glas and you get lower illumination.The plexy can be rotated (mount headstanding) to change between white and red lines. Easy310A, this little friend was oftenly used as service scope for glowing computers. If you want to smile look at the differential adaptor (with IBM logo), it contains only a gold contact mechanical chopper to switch fast between the both inputs, it was displayed on the 310A like a chopped second channel.Your scope have still the little roll with the 3 per cent silver solder. Oftenly that is missing today.greetingsMartin

author: etienne51
author_rank: Contributor
timestamp: June 24, 2016, 03:46:04 pm
content: Yes indeed, I fiddled with the camera quite a bit to get these nice shots!Ok thanks a lot for these informations about the bulbs, now I'll be careful when looking for them. I didn't know about these adapters to get a chopped second chanel. That's interesting stuff.About the silver solder, I know, I've seen a couple 310A (and others) where it was missing. Those are for sale separately on eBay though, but it's always better to have it along with the scope.Now I'm thinking about models like the 454, 545A/B and/or 547, but for the last two, the weight is going to be a real issue since I'm importing these overseas.

author: Martin.M
author_rank: Frequent Contributor
timestamp: June 24, 2016, 07:40:01 pm
content: what means overseas?Tek manufacturings was inPortland, Oregon, USA = Serial No. begins with a 0Beaverton, Oregon, USA = Serial No. begins with a BGuernsey, the channel islands = Serial No. begins with a 1and Heerenveen, NL = Serial No. begins with a 7Some of the 2000 series was made in London in the manufacturing of Telequipment, = Serial No. begins with a 2ask at first in the technical university, oftenly they have downstair some very nice Scopes, and they like to give that when you let them be shure it is for restoration, not for parting out.greetingsMartin

author: coppice
author_rank: Super Contributor
timestamp: June 24, 2016, 08:01:34 pm
content: Quote from: Martin.M on June 24, 2016, 07:40:01 pmThe Telequipment plant wasn't actually in London. It was in Hoddesdon, Hertfordshire, a little north of London.

author: etienne51
author_rank: Contributor
timestamp: June 24, 2016, 08:06:04 pm
content: Oh, I can most definately assure you, there is absolutely nowhere I can find a vacuum tube Tektronix scope where I live. It's a small island, named Reunion Island, a French department lost in Indian Ocean between Madagascar and Mauricius.I did not know that some Tek scopes were assembled in UK! It seems like mine came from Portland, the serial number being "021904".

author: Martin.M
author_rank: Frequent Contributor
timestamp: June 25, 2016, 09:35:20 pm
content: you can ask at the university if they have an old Tek for youPôle Entrepreuneuriat Etudiant de la Réunion,15 Avenue René Cassin,Saint-Denis 97400,RéuniongreetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: June 28, 2016, 05:30:01 am
content: thank you.... and I have forgotten: A Tek where the serial No. begins with a 3 is a SONY Tek, soldet in Tokyo.This is allmost the 300 Series ( some early 300`s are US made like 310, 321 )typical Sony Tek are the little 323, 324, 305DMM, 336 and so ongreetingsMartin

author: etienne51
author_rank: Contributor
timestamp: June 28, 2016, 07:41:12 am
content: Quote from: Martin.M on June 25, 2016, 09:35:20 pmI see you did some research! Thanks. Actually, I know someone at the university, and I already asked him a few weeks ago. He told me he didn't know of any old Tek equipment, but in case he ever finds something interesting, he'll get back to me. Maybe I'll be lucky, but It still doubt that.And sadly, the university here do not have any program for learning electronics...I'm wondering, generally in 500 series scopes, the rubber mounts for the fan are either not in a good shape or just broken sometimes. When I imported my 310A, this was not a concern at all, there is no fan. But one day, I'll probably see if I can import a 547. This particular one is the best "big box" oscilloscope Tektronix ever made, but sadly it has lots of transistors and not so many tubes. A few years back I had a Sony GDM-FW900 24" CRT monitor delivered to me, from France, it was 12Kg heavier that the 547 so this won't really be a problem I guess. I just do not do things like that often, since it's not cheap... What I'm worried about is that fan. Do you think it could be a problem during transport?

author: Martin.M
author_rank: Frequent Contributor
timestamp: June 28, 2016, 08:21:25 am
content: no I think not. When the rubber is too old and dried it will be defect, transport or not.My english is not the best, but look in the german ebay for the search word Silentblock, there is a very lot of them, fresh and with varius sizes.If you need some I can sendAbout the 547: yes, that is amazing. And if you need that double look for the 556 !I use it oftenly, one of my favorites beside the work bench.The transport weight of Tek556 exceeds 45kg, including 2 Plugins. (netto)

author: etienne51
author_rank: Contributor
timestamp: June 28, 2016, 09:44:45 am
content: Okay, I see. Well, I hope it will be fine whenever I'll find a nice 547 for sale in France at best, or Europe. I've seen a few of these rubber mounts on eBay weeks ago.The 556 is just too big and heavy, but if I lived in Europe, US or anywhere else (maybe one day), I would most definately get one! It's basically two 547 in one box, with one CRT. For now, I'll stick with the single beam models.One thing I just thought about, do you have any idea where I might find spare parts like feet, graticule nut, maybe a 234V voltage tag for my 310A? I found some rubber bushings for the feet days ago for cheap, so I got 9 of them, but I did not find any of the other parts.

author: Martin.M
author_rank: Frequent Contributor
timestamp: June 28, 2016, 11:10:12 am
content: hm,go on my homepage, there is a little forum full of Tek Enthusiasts."wanted to buy" will be the right place for that questionWe will also enjoy about some restoration reports and pictures if you like.greetingsMartin

author: VK5RC
author_rank: Unknown
timestamp: August 15, 2016, 10:24:47 am
content: A 545 SN in the 7000s . I may have bitten of more than I can chew, it will be a LONG repair.The front panel is neat and clean, quite a bit of paint scratching on the sides, LOTS of dust inside. The fan rubber mountings have given way. I get about 3ohms between active and neutral if switched on. About 50ohms between the earth pin and the chassis!BUT all the bits are there, all the tube sockets have tubes in them, only minimal/minor surface rust/corrosion, the knobs are in great shape. Is still has the Tek solder loop inside!Is there a known safe / good way to get tubes out of the socket? I was thinking of a fine wood wedge under the tube, above the socket.

author: tggzzz
author_rank: Super Contributor
timestamp: August 15, 2016, 01:05:21 pm
content: Quote from: etienne51 on June 24, 2016, 08:06:04 pmActually, (ignoring the Telequipment scopes) they weren't; they were assembled in Guernsey, which is a Crown Dependency in The British Isles, but not part of the UK.Confused? You will be after watching the amusingBTW, most of CP Grey's videos are worth watching, which is almost unheard-of on youtube!

author: vk6zgo
author_rank: Super Contributor
timestamp: August 15, 2016, 03:31:44 pm
content: Quote from: VK5RC on August 15, 2016, 10:24:47 amIt has a big,fat,power transformer,so the primary resistance should be fairly low---3 Ohms is probably OK.The 50 Ohms between chassis & earth pin is not!Tubes?Are you referring to the CRT itself?-------If not,with ordinary tubes,just pull 'em out!Mark "which one came from where",first.

author: Martin.M
author_rank: Frequent Contributor
timestamp: August 15, 2016, 06:33:13 pm
content: 545, finethere is something to clean before start testing what`s going on.A great old classic Tek.greetingsMartin

author: VK5RC
author_rank: Unknown
timestamp: August 15, 2016, 09:14:03 pm
content: Thanks guys, I will go carefully with this girl, I don't think it has been switched on in a long time.My rough plan is a clean first, I may find some problems, then power supplies , filter caps, then others.

author: Cubdriver
author_rank: Unknown
timestamp: August 16, 2016, 06:10:10 am
content: Quote from: VK5RC on August 15, 2016, 09:14:03 pmThis will be fun to watch - looking forward to seeing the old beast back up and running once again!As for removing the tubes, for those miniature 7 and 9 pin ones, I grab the top and gently rock them in a circular motion (tough to describe, but easy to do - grasp near the exhaust tip and move in a small circle) whilst gently pulling upon them. Make note of where they came from and put them back in the same sockets - some circuits are adjusted to the particular tube's characteristics and will wind up out of whack with the wrong tube. (Vitally important on a fifty year old boat anchor, of course!!!). One nice thing about tubes is that they pretty much scoff at static, so they can be poked into a labeled piece of styrofoam without worry.Be careful cleaning the tubes themselves - many use water soluble ink for the markings, and will quickly get naked if you hit them with window cleaner or the like. It won't harm them, of course, and you'll be fine as long as you keep track of what's what, but I like having the manufacturer's markings on them. The type number may be etched into the glass, in which case it will be fine, but logos, etc may go away.And on that note, I should be asleep. Best of luck with the new wigglescope!-Pat

author: Martin.M
author_rank: Frequent Contributor
timestamp: August 16, 2016, 03:58:33 pm
content: something to know for the first Classic Tek restoration.There is the vertical slot with a plugin. The tubes there (you have CA? = 15 tubes), a lot of them are heated by the +100V DC, in series 150mA. Means when one of them is defect the complete plugin stop glowing. The summary of the dc filament is around 75 volt, then there are mostly 2 tubes inside in the mainframe they are also series connected in that circle! look for a 12AL5 in the chassis part what you can swing out. If this tube is not glowing it can be a problem in the plugin, must not be defect.electrolytics of the PSU: they are mostly OK, the quality of them was timeless ! The paper covered elkos there are some where the case is NOT connected to the chassis, its an isolation.Please be carefully, old Tek work with dangerous high voltage.When cleaning take care, do not make wet transformers, special the HV transformer in the hv box must be dry.on your picture you see at upside by one of the ceramic strips written voltages, +500 +350 +225 +100 -150V there is the best place for checking them.The -150V must be very exactly, it is the reference voltage for all others !greetingsMartin

author: AF6LJ
author_rank: Unknown
timestamp: August 16, 2016, 11:05:29 pm
content: This is going to be fun to watch.

author: VK5RC
author_rank: Unknown
timestamp: August 17, 2016, 12:06:43 am
content: Thanks Martin and Sue, I have just done a little gentle cleaning, small dry brush and vacuum nearby.Great to hear electrolytics are pretty reliable.I have read the 545 doesn't have a fuse on one power supply rail, the 545a and b does apparently, that might be a useful 'update' before switch on.Unfortunately work is pretty busy at present so updates may be slow.Thanks.

author: Martin.M
author_rank: Frequent Contributor
timestamp: August 20, 2016, 02:27:22 pm
content: dont be afraid to wash that old Tek with windows cleaner,that oldies are not afraid from this prodedure, except HV Box + the large transformer.

author: bitseeker
author_rank: Super Contributor
timestamp: August 20, 2016, 11:06:55 pm
content: Impressive restorations, Martin. So, when does the "Tek by Martin" museum open?

author: VK5RC
author_rank: Unknown
timestamp: August 20, 2016, 11:59:40 pm
content: Hi Martin.M Thanks for the cleaning tip, I have been using1 soft brush and vacuum nearby2 Isopropyl alcohol (IPS) soaked cotton cloth strips3 IPA soaked brush or cotton buds (Q tips) for really tight spots4 Water for the tubes body, IPA for the pins5 A very small wipe of 'Gun oil' metal preservative over metal threads or metal cases , some with a bit of surface rust see potentiometer bodyI have only tackled the lower right side to date but found a piece of wire (about 4cm long) resting at the base of one valve, not attached in any way, possibly touching some of the pins, looks like it fell in there!! Hopefully it didn't short out too much.I will tackle the rest slowly, then test the power supply, before fire up!I think I might test each valve. a bit of a task!As a break form cleaning I took the fan out, it worksbut the 3 vibration mounts have perished but found a very close fit from RS componentsSome before and after photos of what I have done to date

author: Martin.M
author_rank: Frequent Contributor
timestamp: August 22, 2016, 09:53:49 pm
content: that looks nice, good jobThe very first after power up is the check of -150V.On your picture2 you see the pot for adjusting this voltage.All other voltages of the PSU use this -150V as reference. The accuracy of -150V is desired to <1VgreetingsMartin

author: VK5RC
author_rank: Unknown
timestamp: August 26, 2016, 06:58:11 am
content: A quick minor update, the rubber fan mounts had gone soft and parted company, an RS component (see packet and part number in photo with one old and two new mounts) was a very good fit. :beer:Fan cleaned , metal preservative on the aluminium, light motor oiling and works nicely.

author: Martin.M
author_rank: Frequent Contributor
timestamp: August 28, 2016, 05:06:00 am
content: the fan can also be washed with windows cleaner, following lubrication (silicone oil is nice bec. it is good for warm parts)greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: August 28, 2016, 12:50:11 pm
content: the next step in Tek restorations:This is a rebuild Tek pounch for the little 211, 212, 213, 214 and 221,it follows very fine the original design and color

author: etienne51
author_rank: Contributor
timestamp: September 07, 2016, 09:09:45 am
content: Quote from: Martin.M on August 28, 2016, 12:50:11 pmMy collection grew up a bit during the last few months. Now I have a 454 and a tiny 221! I also happen to have the original vinyl pouch for the 221, which is in great condition. Those are really nice scopes, and they are really clean as well. There are some technical issues that I'll have to investigate though.Some of the Volts/Div ranges of the 454 are out of the display area on CH2, and the trace tends to jump quite a bit sometimes on that same channel. CH1 seems okay.For the 221, the inverter circuit is dead. I did replace both of the power transistors, one of them was dead, and it worked again for a few minutes then died again. So it seems like a diode is faulty or something else. I need some more time to look into it. For now, it works nicely on external 12VDC!

author: Martin.M
author_rank: Frequent Contributor
timestamp: September 07, 2016, 05:21:11 pm
content: amazing, another 221my 7k have now learned to count the frequency and display it in the readout,by a 7D15 counter plugin.greetingsMartin

author: etienne51
author_rank: Contributor
timestamp: September 10, 2016, 07:23:56 pm
content: This is a nice 7K scope you have here! For the moment, I'll receive a Tek 547 in the next few weeks. It's been a long time I wanted this one.It's going to be shipped... and this monster weights so much, it has to be shipped in two packages to save on the shipping costs. The oscilloscope equipped with a 1A4 plugin in one package, and the mains transformer in another. The seller was kind and agreed to desolder all the wires on the transformer cleanly, and tag each one of them so I could put things back together with no issues at all. So that's really great!The scope seems to be in a really good shape, it works fine, it's almost not dusty at all.I'm wondering, about those big terminals on the transformer. I only have a Hakko FX888D soldering station, and I'm not sure that's powerful enough for something like that. I was thinking about getting a Weller soldering gun a while back, I didn't. I think it may be time to do so. Any advises on the best way to solder these? I know the Weller gun can go really hot and it would be great to use here, but I also don't want to overheat something in the process. I know silver solder is not necessary here, so I'll just go for my regular Kester 63/37 after cleaning the terminals.

author: Martin.M
author_rank: Frequent Contributor
timestamp: September 11, 2016, 06:57:49 am
content: why you remove the power transformer there?greetings Martinp.s. I am on the way to buy a 500`series TM Set, (a counter plugin, 2x multimeter plugin, a complex generator plugin and a small psu plugin) ugly expensive Tek gear... but I love thatand 2 scope carts was found in a university.

author: etienne51
author_rank: Contributor
timestamp: September 11, 2016, 08:36:47 am
content: I wouldn't have done it if it was a local pickup. There is no ground shipping option to here, and the cheapest way do get something is through the postal service. I guess it's the same in all countries but, the maximum allowed package weight is 30Kg (66lbs). The package here was 37.5Kg (82lbs) so that's why!More Tek stuff, that's great!I'll stick with the 547 for the 500-series scopes, unless one day I'm lucky and I find one locally. The only other model I'm really interested in would be the 556... One day I got a big 42Kg (92lbs) CRT computer monitor (Sony GDM-FW900) shipped, so the 556 is possible since it weights about the same, but definately later.About the carts, I'll just build one for my 547 when it arrives. My custom cart probably won't be tiltable, but I'll see what I can do.

author: Martin.M
author_rank: Frequent Contributor
timestamp: September 11, 2016, 09:00:18 am
content: Tek 561, 564 (10mc storage), 310A are very glowing and will not exceed the 30kggreetingsMartin

author: etienne51
author_rank: Contributor
timestamp: September 11, 2016, 11:00:45 am
content: Haha, I won't collect all of them like you do!Right now I own the following models:-Tektronix 310A(021904)Simply one of the most amazing mechanical design that can be seen on a glowy test equipment. I got this one for my own collection only, pretty much. It's a masterpiece of vintage electronics test gear... It has a limited 4MHz bandwidth but definately enough for audio work for example and some analog projects.-Tektronix 547(013807) -soon-The 547 is the top of the line when refering to single beam oscilloscopes of the 500-series. Makes use of all their technological advances, including the exclusive "Automatic Display Switching" feature, which can be really useful in some situations. Still not the fastest of the 500-series, which is the 585 as far as I remember.-Tektronix 454(B276947)This is the scope that I'm using for my projects right now. This is the last model that makes use of those super sharp CRTs as far as I know. It follows the 453 which was designed for IBM when they asked for a portable oscilloscope that technitians could bring along with them when travelling. It was made for computer work back in the 60's - 70's. The 453 is the oscilloscope that introduced the rotating handle. The 454 is basically the 453 with a tripled bandwidth. The 454 is the fastest analog oscilloscope that uses only discrete components, no custom ICs.-Tektronix 221(B054502)This one is a cute small oscilloscope! Litterally the nicest looking small analog oscilloscope to date. I tend to bring this one with me when I have to debug some analog circuits. This is the fastest model of this line, there are all the other models, dual trace storage, integrated dmm or simply dual trace. This one is single trace but has a 5MHz bandwidth which is a lot more useful to me than dual trace and 500kHz, but I can't compare signals.-Tektronix 2465B(B055041)This was my first Tek oscilloscope I got years ago, still my main bench oscilloscope. I was not into collecting Tek scopes back then... the madness started later.Before that I used a digital Rigol 1052E which was kind of horrible when trying to debug the analog circuits of my CRT driver boards project. This is probably the fastest portable analog oscilloscope. Despite being analog, its OSD has some really nice features that helps with quick measurements, but I should not get used to that too muchThis is what I have in mind:-Tektronix 585ASimply the fastest of the 500-series oscilloscopes (excluding the oddball 519)! It reaches 100MHz easily with tube based circuitry. It has 4 transistors though, so it's not a vacuum tube only equipment, it's a hybrid. This one uses special plugins to reach such a high bandwidth but can still accept slower regular 1-series and letter-series plugins via an adapter.-Tektronix 555(aka "Triple Nickel")This is a monster... This model is not the fastest dual beam in the 500-series, that would be the 556. But I admire this model with its separate power supply that uses a saturable reactor design to regulate the voltage of all the tube filaments in the entire oscilloscope. It takes not only the two vertical plugins, but also two horizontal timebase plugins. This is probably the most power hungry of all the Tek oscilloscopes with 1kW as far as I remember...-Tektronix 556If going for a dual beam Tek from the 500-series, this is the top of the line. It's, I guess, the replacement for the great 555 but unlike this one, it does not use horizontal plugins. It's like two Tek 547 in one box. A lot of combinaisons are possible between the top/lower beams, the A/B timebases and the left/right plugins. For example it's possible to display one same signal through a vertical amplifier plugin in one bay, and a spectrum analyzer plugin in the other bay.-Tektronix 519This one is unlike any other 500-series scope. It is a blazing fast 1GHz analog oscilloscope made in the early 60's... No vertical amplifier, the signal goes straight to the delay line and the deflection plates of the CRT. Is uses special connectors and has a 125-ohm input impedence. This is definately not the every-day use test equipment, but it is definately an awesome collection piece!-Tektronix 515A / 516There is nothing incredible about these two, but those are nice smaller oscilloscope models that still makes use of big 5" CRTs. They both have a 15MHz bandwidth which is plenty enough for a lot of projects, if using them on a regular basis and not only for the collection. I'd say it would be a smaller version of the 533, or something close, but without the vertical plugin bay. The 515 is a single trace model with a switch to select between two inputs, and the 516 is a dual trace model. The difference between the 515 and 515A is that the A version has an external Z-axis input and slightly higher sensitity.And there is the 7k series oscilloscopes which are probably the best of all the analog oscilloscopes with a plugin-style design. Great stuff! No tubes involved here of course, and a lot of proprietary ICs.Something I'm going to build soon is a fast edge pulse generator that I'll use to measure the rise time of the oscilloscopes I own and determine their maximum bandwidth. There are a few different ways of doing something like that, and one of them is using the avalanche pulse generator design from Jim Williams. I have a Tektronix BNC accessory housing, so I'll see if I can use it for that project.

author: tpy
author_rank: Newbie
timestamp: September 11, 2016, 12:36:09 pm
content: Great job. This will be fun to watch.

author: Martin.M
author_rank: Frequent Contributor
timestamp: September 11, 2016, 01:30:23 pm
content: Quote from: etienne51 on September 11, 2016, 11:00:45 amTime to learn a little morelook in my little community what my friend Matt have done therehttp://www.wellenkino.de/forum/thread.php?board=1&thread=166That is a living 517Athe biggest baby in the Tek family, and of coarse more hungry then a 555greetingsMartin

author: tggzzz
author_rank: Super Contributor
timestamp: September 11, 2016, 02:05:47 pm
content: I'm not sure whether a purist would count this as a "restoration", but it has certainly returned some old Tek equipment to active service.I've recently had to debug several scope's 2kV-3kV HV supply and the CRT's Z-axis waveforms at 2.5kV. So far I've got away with using a homemade 1000:1 voltage divider and a multimeter. Since that is crude and not particularly safe, I'm not going to mention the details in order to avoid someone apeing me and hurting themselves.Then, at a recent auction mentioned elsewhere in this forum, I managed to pick up:a 40kV meter for measuring 17kV anode voltages, but which barely registers 2kVa Tek P6013A 12kV 1000:1 100kHz scope probeThe probe was functional but missing part of the handle, as shown in the first picture. While not strictly necessary, I wanted to have a little fun fabricating the missing part.I asked various people at my local Hackspace how they would make a handle, but all the suggested techniques for the large thread seemed tricky and would require buying equipment. Richard Sewell offered the use of his thread gauge to measure the thread, and I eventually decided the easiest, surest, cheapest and fastest way was to 3D print a handle.Not being sure I would be able to specify the thread sufficiently accurately, I decided to add a lip to the original design, so if the thread was loose I could still jam the body against the lip. It took me a half a day to create the model using OpenSCAD, most of that being taken up with triple checking all the dimensions. The Hackspace's RepRap 3D printer was inadequate for making the thread, but from previous experience I knew that both Shapeway's "strong and flexible" nylon and Dangerous Prototype's SLA materials would work well. The SLA was cheaper (£13 delivered), so I chose that. In the event the handle fitted perfectly, better than I had hoped.So with a small amount of money, half a day's work (plus some thinking time), and a little help from my friends, I can now debug CRTs less dangerously - and I can eventually sell a working probe for a relatively obscene amount of money

author: etienne51
author_rank: Contributor
timestamp: September 11, 2016, 02:35:25 pm
content: Quote from: Martin.M on September 11, 2016, 01:30:23 pmHell... I didn't know this one.Hats off to this fellow for his great restoration! That's one crazy piece of equipment, I haven't noticed that Tek made a 50MHz scope so early.Thank you for the link.Quote from: tggzzz on September 11, 2016, 02:05:47 pmGreat job on that custom part! I'm not sure this could be called a "restoration" considering that some people may call "restoration" the work done to bring an instrument, accessory or anything back to its original state. But that's definately a nice fix you did here!In fact, a few months back I saw a Tek HV Probe on eBay US for cheap. I'm not sure if it was the same as yours. At that time I didn't really need it and I had other things in mind, so I hesitated. It was sold quite fast as far as I recall.On my own circuits when I check the Z axis, the whole circuit is floating so I can probe the Z axis relative to the cathode... but NO ONE SHOULD EVER DO THAT since everything that should be at ground potential is then raised at about +2kV (on my circuits).That's why I should soon get a good probe, I'm going to change the blanking design, and partially replicate what Tektronix did on the 454. To explain briefly, since it's not the topic here, my circuits uses digital blanking right now, through a 2kV-continuous rated optocoupler. The blanking circuit is then working at cathode potential. On the 454, the blanking circuit is working at ground potential, and there is a -2kV offset voltage that is added to the blanking signal. That brings that same signal below cathode potential for the grid. That way, I won't need the optocoupler, and I could get analog blanking working and do a lot more stuff with the CRT. I'm not sure I'll be able to do something as clean and precise as Tektronix did on the 454, but I'll ask my credit card for help the next time I see a good HV probe for sale at a reasonable price, so I can check for issues on my circuit properly.

author: tggzzz
author_rank: Super Contributor
timestamp: September 11, 2016, 02:54:52 pm
content: Quote from: etienne51 on September 11, 2016, 02:35:25 pmThe P6015 is 17kV, but requires occasional refilling with Freon, which is, of course, unobtanium. Without the Freon it is a 13kV probe. The P6015A uses a silicone based replacement."Ebay working" probes seem to be £120-£400.QuoteThey use similar circuits on many scopes. The DC restorer components are a traditional failure point. You can use a handheld multimeter to check the Z-axis waveform has been succesfully translated to -2kV, but I wouldn't hold the multimeter ro probes while doing it!The Tek 1502 has a simple HV circuit. I find it amusing to consider the voltages on the front panel intensity and focus controls, especially when the scope is designed to be used when very wet!

author: HighVoltage
author_rank: Super Contributor
timestamp: September 11, 2016, 03:41:27 pm
content: Quote from: tggzzz on September 11, 2016, 02:54:52 pmI just obtained an original P6015, still filled with Freon and an extra bottle of FreonThe peak voltage rating of the P6015 was higher than the new silicone gel filled P6015AThe biggest problem: The P6015 could be repaired (as long as you had some Freon) but theP6015A will break because of the silicone gel, when attempted to take apart.I still have a body of a P6014 (short like P6013) and an original P6013/14 handle that I don't need anymore.If anyone should be in need of these parts let me know.@tggzzz may be you want an option to have an original handle as well, let me know

author: tggzzz
author_rank: Super Contributor
timestamp: September 11, 2016, 04:06:04 pm
content: Quote from: HighVoltage on September 11, 2016, 03:41:27 pmBlimey, twice over! Firstly that it is still "filled" with Freon (I believe you only need 1mm fluid, plus the Freon vapour above it), and secondly that there's still some in the extra bottle. On second thoughts, perhaps the second is because of the firstQuoteThanks for the kind offer, but I'm not desparate to get an authentic handle. Hence I suspect it is worth more (in both senses) to someone else.OTOH, pleasedolet me know before you throw them in the bin!

author: HighVoltage
author_rank: Super Contributor
timestamp: September 11, 2016, 04:54:22 pm
content: Actually I still have two of these P6015, both with the original Freon filling inside.Getting the actual original bottle of Freon (Fluorcarbon114) was in fact an amazing bonus to a P6015BTW, you can use the much smaller compensation box of the P6015A on the P6013/14/15It works very well. I have my two P6015 hooked up to the compensation box of the P6015A.And you are correct, you just need as much Freon in the probe to have the little red plastic ring floating.The insulation is done through the vapor of the Freon.

author: PartialDischarge
author_rank: Super Contributor
timestamp: September 11, 2016, 05:09:48 pm
content: Quote from: tggzzz on September 11, 2016, 02:05:47 pmThose probes are a must for HV measurements. Just a word of caution, be careful where you connect the probe 'ground' (for the well know ground loop through the scope). If you decide to isolate the scope ground be very wary, the isolation provided by the scope is not to be trusted.Thats why I ended buying a Fluke 123, just to make isolated and floating measurements. I have a setup in which a foot pedal energizes a relay that provides 220V to the system under test (running at between 3 and 10kVrms). Before pressing the pedal I back one meter or so from the stand.

author: tggzzz
author_rank: Super Contributor
timestamp: September 11, 2016, 06:30:47 pm
content: Quote from: MasterTech on September 11, 2016, 05:09:48 pmThanks for the warning and thinking of my safety, but inthiscase it is unnecessary. There are even other threads on this topic where I (and others) have had to repeatedly tell someone that they shouldn't "float the scope". It can be remarkably difficult to "get through" to some people, especially those that think if they don't understand a problem then there isn't a problem. Mind you, I suppose in some useless way, they are rightI do have a proper isolated differential probe, which is fine for mains voltages (plus a bit), but nowhere near sufficient for a CRT HV supply.QuoteMine's a Fluke 21, but otherwise I'm notthatcareful. Since my daughter has grown up I don't have any dependants! But it does sound like a good idea for the 17kV, if/when I have to go there.

author: Martin.M
author_rank: Frequent Contributor
timestamp: September 11, 2016, 07:41:08 pm
content: I have rebuild the 7k with counting warmThis is my 556, the Nixiecounter is connected to the frontal Trig Out from the 1A1 plugin,delivering a direct frequency readout100 pounds and near 900W but very good working.greetingsMartin

author: AF6LJ
author_rank: Unknown
timestamp: September 27, 2016, 12:35:38 am
content: That looks really nice.

author: blitzaxt
author_rank: Newbie
timestamp: October 20, 2016, 12:23:36 pm
content: I hear that you are the guy to ask when it comes to repairing old Tektronix scopes.Quote from: tautech on October 20, 2016, 04:43:48 amI have an old 535a and 561b I am trying to repair see my post here:https://www.eevblog.com/forum/repair/tektronix-535a-561b-help-needed-for-repair/Any help would be greatly appreciated.Thanks!

author: Martin.M
author_rank: Frequent Contributor
timestamp: March 01, 2017, 04:37:27 pm
content: yesterday arrived: Tek 515A

author: Cubdriver
author_rank: Unknown
timestamp: March 01, 2017, 05:09:50 pm
content: I've no doubt that you'll shortly have it looking and operating better than it did when it left the factory who knows how many years ago.I look forward to pictures of its innards.-Pat

author: 1audio
author_rank: Frequent Contributor
timestamp: March 02, 2017, 04:54:21 am
content: Brings back memories. I had at one time 2 547's and a 556. A 549 also at one point.I have some manuals to pass along: 1A2, 1A5, 434, 556, cal fixture for 5 series scopes, 1L5, 422, 3a(, 3L1 and a Tek vectorscope.I also have a collection of 7K plugins and 3 7854's.In the '80s Tek was offering some services including the multicolor anodize and PCB fab. I used them for some audio products but they shut it all down by the end of the '80s.

author: Martin.M
author_rank: Frequent Contributor
timestamp: May 14, 2017, 07:47:04 pm
content: the little Tek213 got a problem: not charging the batteries.In the Tek Wiki is a manual page of the charging unit, there is to read from a Cap of 0.0033µF what is to check first when it will not charge.Done, and trueI desoldet this Cap and put there another one, then the little scope was allready working2.68Volts = charging, there are 2 pcs of 1,22V NiCd inside.greetingsMartin

author: bitseeker
author_rank: Super Contributor
timestamp: May 15, 2017, 04:41:47 am
content: Nice one, Martin. Every time I see one of these little Tek's, I want to get one. They're so cool.

author: Martin.M
author_rank: Frequent Contributor
timestamp: May 15, 2017, 04:11:35 pm
content: hello friends,I think the time has come to talk about an dust sucker (home cleaner)greetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: May 15, 2017, 04:16:05 pm
content: why I have postet that? See self.The Design is very useful to build an oscilloscope. Tek have done...the "T Class" , this is a T932Acold 2 channels in dust sucker designThe problem: there is no HV, this will be interesting to restorate that apparatus.greetingsMartin

author: tautech
author_rank: Super Contributor
timestamp: May 15, 2017, 08:02:06 pm
content: Your T reminds me of my first scope, a Telequipment D83 that had a nice large display too. They were owned by Tek.Mine had no HV when I got it and if the inverter layout is similar the NTC thermistor on the HV supply had crumbled with age. Still got some spares if you need them.

author: dave_k
author_rank: Frequent Contributor
timestamp: May 15, 2017, 10:50:49 pm
content: Quote from: Martin.M on May 15, 2017, 04:16:05 pmHeh .. this made me chuckle. Then I think "any device with a fan inside it is a dust sucker design".

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 16, 2017, 01:20:59 am
content: Quote from: dave_k on May 15, 2017, 10:50:49 pmThough amazingly, my TDS460 has very little dust in it, despite my using it for several years in a dusty office environment. Huge fan, open design, yet something about it seems to let dust settle, or float over surfaces rather than smacking into and sticking in place.Tim

author: bitseeker
author_rank: Super Contributor
timestamp: May 16, 2017, 02:05:47 am
content: Quote from: Martin.M on May 15, 2017, 04:11:35 pmPerfect. It looks about the right color, too.

author: Vince
author_rank: Super Contributor
timestamp: November 27, 2017, 11:40:03 pm
content: MARTIN !!!! Still around ?First things first : thumbs up for your incredible collection of old Tek scopes !I am posting in a desperate attempt that maybe you could help me with.... the restoration of my first tube scope, a Tektronix 317.I have it pretty much sorted by now, but I am having a problem with something silly which drives me nuts : the motor for the cooling fan.. it's "lazy". It starts first time no worries, but it spins only very slowly. Sometimes, after a while, which can be anything between 5 seconds to 5 hours, suddenly it will decide to spin faster and actually move some air.I did quite a lot of work on this motor, but I am running out of ideas now... I am about to give up but thought well, why not ask Martin about it ! Maybe it's a common problem and you can enlighten me in some way about it.... even if it's not fixable, just knowng what's wrong with it would make me kinda happy.Here is the link to my topic on this scope, if you find the time some day :https://www.eevblog.com/forum/repair/vintage-tektronix-317-repair-and-restoration/msg1356218/#msg1356218In the mean time, I will start cleaning the scope, using all the tips I read on here...

author: Wolfgang
author_rank: Super Contributor
timestamp: January 10, 2019, 05:26:34 pm
content: Scope porn at its best. Icons of engineering instead of todays heaps of cheap plastic.Anyway, dont get close to these. TEA is heavily contageous.

author: Vince
author_rank: Super Contributor
timestamp: January 10, 2019, 05:33:26 pm
content: Quote from: Wolfgang on January 10, 2019, 05:26:34 pmToo late in my case I fear... now that I have just finished the restoration of my first classic, my little 317.... I just couldn't help but " harvest " all those that I could get me hands on, in the past few months ! Have 9 of them now... lots of trouble-shooting and restoration ahead now, will keep me busy during the long winter nights !

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 10, 2019, 05:47:40 pm
content: a Tek 5223 "Digitizing Scope"normally the 5k series is a low cost, but this one?It`s talking on GPIB, and can drive a analog penplotter to paint a hardcopy of the screen (outputs at backside: X, Y and Pen lift.)The speed is not enough to win a race.greetingsMartin

author: Vince
author_rank: Super Contributor
timestamp: January 10, 2019, 05:53:43 pm
content: A 5223 ?!What a coincidence, there is one that appeared a few days ago in my neck of the woods, been contemplating it indeed... but it's priced at 260 Euros ?!Not for me....https://www.leboncoin.fr/sports_hobbies/1546273137.htm/

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 10, 2019, 06:04:42 pm
content: there is some people who don`t know what is a scope, so they ask for too much money.

author: Wolfgang
author_rank: Super Contributor
timestamp: January 10, 2019, 07:29:46 pm
content: Quote from: Vince on January 10, 2019, 05:33:26 pmPoor soul ! You are gonna rot in TEA hell as all the others

author: Vince
author_rank: Super Contributor
timestamp: January 10, 2019, 07:38:51 pm
content: Oh no, not in hell ! I hate hot climates !I guess I will just have to buy air-conditioning for the lab then.... I will adapt !

author: bitseeker
author_rank: Super Contributor
timestamp: January 11, 2019, 01:07:43 am
content: There are worse demises.

author: mnementh
author_rank: Super Contributor
timestamp: January 11, 2019, 06:48:07 pm
content: Judging by the inspection tag, thatuber-rare Tek 549 storage CRTwas made about the same time I was.Thanks for sharing your addiction to vintage Tek gear with the rest of us.mnem*More than the sum of my inputs*

author: rhodges
author_rank: Frequent Contributor
timestamp: January 11, 2019, 06:51:05 pm
content: I just found this thread yesterday. Such beautiful equipment!My first scope was a Tek 544 with a differential (type W?) plugin. I got it in a trade... For a printer selection switch.At work, we had a couple Tek 2215 (I think) and some HP scopes. I hated the HP scopes, the triggers were bad. The boss said it was okay for me to bring in the 544, and it worked well, a pleasure to use.A few years later, I got a 465M and then a 2465. The 544 was big and heavy, but I still have good memories with my first scope.Thank you for all the nice pictures!

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 23, 2019, 07:34:10 pm
content: Restoration:When a tube Tek want to sniff UHF frequencys, give him this, it`s Tek voodoo from the old time.

author: bd139
author_rank: Super Contributor
timestamp: January 24, 2019, 07:28:03 pm
content: Nice bit of kit and a nice job as always

author: tkamiya
author_rank: Super Contributor
timestamp: January 25, 2019, 12:39:13 am
content: I wish I kept RM15 from way back when....I have lots of scopes but none made with tubes. I guess they are "collector" items now that prices have gone up quite a bit. I don't seem them much in wild anymore. I would like to have ONE just for memory.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 27, 2019, 03:30:10 pm
content: the bad side is, that some "audiophools" made parting out lists of the tubes what are plugged in all the fine scopes.They buy instruments only for salvaging tubes what they use to build some painful audio amplifiers from them..People who care and collect Tek Oldies will never give a scope to one of them. So the offers are mostly inside of the collectors communitys.RM15 is the rackmount version of Tek 515A. You need exactly this instrument or any warm Tek?If any, it`s allowed that the Tek is big and heavy like a 535A? It have to be in working order or for restoration?Send me pm with email adress and your location area, I will ask for a nice glowing Tek.and take a look in som american craigh lists, there are oftenly scope oldies alsoMartin

author: coppice
author_rank: Super Contributor
timestamp: January 27, 2019, 04:02:24 pm
content: Quote from: Martin.M on January 27, 2019, 03:30:10 pmThat works both ways. There would be no tubes in production for repairing old equipment if it wasn't for audiophools and guitar amps.

author: tkamiya
author_rank: Super Contributor
timestamp: January 27, 2019, 04:07:59 pm
content: Martin.MThank you. For some reasons, I cannot send you a PM. Click on PM button and it goes right back to the forum itself.My email is tkamiya9yahoo.com. Working sample is better but I am able to repair. RM15 would be nice but any tube tek will be nice, too.I'm not really choosy.My intention is to restore it and display it like you do, as well as occasionally use it. So ones that will clean up well would be nice.

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 27, 2019, 05:38:24 pm
content: sent.

author: tkamiya
author_rank: Super Contributor
timestamp: January 27, 2019, 05:38:42 pm
content: How do you clean them SO WELL?On one page, I see tooth paste in background and internals looking like it has been shampooed. I love scopes and restoring them. I can wash the outside but for inside, I only wipe. But apparently, you do so much more. Do you have blog or anything that I can learn from?

author: Martin.M
author_rank: Frequent Contributor
timestamp: January 27, 2019, 06:56:53 pm
content: when we have found the Tek for you (this will be no long time) you get a full support to restorate that, including a video how to wash insidethe website is here:www.wellenkino.deMartin

author: worsthorse
author_rank: Super Contributor
timestamp: March 08, 2019, 10:08:35 pm
content: One of your admirers sent me over here because I am considering buying a pile of 500 series oscilloscopes to save them from the dump. What excellent work you do! Thanks for posting all this here for people like me.

author: Martin.M
author_rank: Frequent Contributor
timestamp: March 17, 2019, 09:40:22 am
content: it would be fine to read here some restoration reports.If there are problems we can helpMartin

author: 0culus
author_rank: Super Contributor
timestamp: March 18, 2019, 08:44:05 am
content: Martin, did you get my PM a while back?

author: Jacques021
author_rank: Newbie
timestamp: June 11, 2019, 11:53:14 am
content: I bought a Tek 545B about a year ago with very low mileage on it as the previous told me it was his spare scope at work and indeed it was in absolute mint condition and no one worked on it before. I cleaned her out of all the dust and shes working beautifully! It came with the "normal" CA Type plugin and it works perfect!Recently I bought a late model 1A1 Type plugin (In very good and clean condition and uses fets, transistors and 2 nuvistors). It shows both traces just fine but I cannot adjust the traces of both channels higher than the middle of the CRT, so in other words the middle is the highest the trace would go with the vertical pot turned all the way, it goes off screen when I turn it the other way.I guess its way out of alignment?... or maybe just pot that needs adjustment in the plugin itself...Any advice would be appreciated.Jacques

author: Martin.M
author_rank: Frequent Contributor
timestamp: September 09, 2019, 05:33:39 pm
content: The Makerfaire Hannover 2019,I got a nice 549, 1L5, 1A1 and a p6042.

author: Martin.M
author_rank: Frequent Contributor
timestamp: September 09, 2019, 05:39:32 pm
content: I have restorated a second µTek, Type 213it got new NiCd Cells and a lot of cleaning inside and outside.The battery plug was RIP.

author: xrunner
author_rank: Super Contributor
timestamp: September 09, 2019, 05:55:40 pm
content: Nice work Martin - very cute.

author: Martin.M
author_rank: Frequent Contributor
timestamp: September 09, 2019, 06:43:35 pm
content: workbench temperature for a good calibration..the K Type sensor make it working from -100 up to +1200°C this is also good for warm and sunny days...restorated John Fluke 2190A

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 09, 2019, 06:00:35 am
content: ... just playing (game of glow)This is a result while restorating a hungary made function generator. (Classic Tek 556 in XY Mode at beam 1)https://www.wellenkino.de/video/emg-1.mp4https://www.wellenkino.de/video/emg-2.mp4https://www.wellenkino.de/video/emg-3.mp4

author: 0culus
author_rank: Super Contributor
timestamp: June 28, 2020, 08:10:39 pm
content: Has anyone heard from Martin lately?

author: Larryc001
author_rank: Regular Contributor
timestamp: June 29, 2020, 03:09:46 am
content: I have posted my link on eevblog before, but I will post it here in case anyone would like to see. I thought I could stop buying but just got a 502A, a 321A and a 541A from eBay. So I guess I will never be done. Great work Martin, I only wish we lived next door to each other.https://photos.app.goo.gl/vWHUhwHc74o7ed7Q9

author: AaronLee
author_rank: Regular Contributor
timestamp: July 29, 2021, 05:31:04 am
content: What a wonderful thread. Thank you so much Martin for all the photos. Now I've caught the bug, and want an old vintage scope as a showpiece for my workbench. I promise though, just one for me. I won't start hoarding old scopes and make them less available to the serious collectors who so lovingly spend so much time restoring these beauties.I think the Tek blue will go well with my original IMSAI 8080 blue, being presently the only piece of vintage gear on my workbench. I never imagined such a wide selection of old vintage scopes existed, though it certainly makes sense when you think about it. Now I just need to decide which one to get. I'm not looking for it to necessarily even be working, rather I just want a nice looking piece of vintage gear to gaze at when I'm working and contemplating some problem/issue. I love the old Tektronix logo, the scopes with the red knobs, and the circular CRT tube. But I don't want it to take up too much space. Seeing your photo of the 515A, I think that model might be a good match for me.

author: med6753
author_rank: Super Contributor
timestamp: July 29, 2021, 12:47:55 pm
content: I first posted to this thread back in 2015 after just recently joining the blog. I had been inactive in the hobby for many years and the only Tek scope I had then was a 2465 DMS which was given to me. Well things have changed slightly since then due in no small part to what Martin has accomplished. He was my inspiration to find and restore old Tek iron. I think I've done pretty well. And after I retired in January 2019 I really picked up the pace. All the restorations shown here can be found in my main hangout in the TEA thread. I hope Martin doesn't mind me adding my collection to his thread. After all, us Tek nuts have to stick together.Currently under restoration. Type 547. Waiting on parts to fix a vertical issue.Type 535A on custom made scope cart usually occupied by a 7904 (not shown). Future plans are to build another cart.Top shelf Type 454Bottom shelf 2465 DMS485 on top of somehpcounters.Top shelf. Galley of defective CRT's. RCA Institutes 54-45. Type 321A. Assorted B&K gear.Middle shelf. Type 503. 465B/DM44. Type 310A with rare fan mount. Type 561B.Bottom shelf. 2430. RCA WO-505A. OS245(P)/U....military version of 7603N.465B. Heath OL-1. 485.Top. Type 191. Type 114. Type 106.On floor. Type 422.475A and 2465.

author: AaronLee
author_rank: Regular Contributor
timestamp: July 30, 2021, 12:01:17 am
content: Quote from: med6753 on July 29, 2021, 12:47:55 pmThanks so much for sharing those photos. I've only read a few posts in the TEA thread, but there's just too much there to wade through to try to get information that I'm interested in. IMHO, it would be nice if there was a dedicated thread to vintage Tek equipment, and some links in it to already existing threads such as this. I don't have any photos myself in which to start such a thread though, being I don't yet even own any vintage Tek gear.

author: med6753
author_rank: Super Contributor
timestamp: July 30, 2021, 02:52:11 am
content: Quote from: AaronLee on July 30, 2021, 12:01:17 amLet me know what you are specifically interested in and I'll try to help you find it.Edit....if you want an example of what's involved in restoring one of these old beasts check out this thread:https://www.eevblog.com/forum/repair/repairrestoration-of-a-tek-type-561b/

author: AaronLee
author_rank: Regular Contributor
timestamp: July 30, 2021, 04:35:50 am
content: Quote from: med6753 on July 30, 2021, 02:52:11 amThanks for the link to that thread. It was an interesting read. I think I'd prefer to just get a scope that's already been restored. I doubt I have the expertise to do it myself unless I spend way too much time researching everything first. I guess just continuing to check Ebay or other sites is the best way, and wait until something comes up that catches my eye.

author: 0culus
author_rank: Super Contributor
timestamp: July 31, 2021, 10:14:35 pm
content: Quote from: AaronLee on July 30, 2021, 04:35:50 amDon't discount the learning potential from troubleshooting and carrying out repairs. All of these old beasts have full documentation in the instruction manual, and the circuits were designed by very smart people. You'll definitely learn something every time.

author: AaronLee
author_rank: Regular Contributor
timestamp: August 01, 2021, 03:45:43 am
content: Quote from: 0culus on July 31, 2021, 10:14:35 pmIf someone without any experience were to embark on a restoration project, which scope(s) would you recommend?About the full documentation, you ain't kidding! I just had a glance at the documentation of one of the old Tek scopes, and I couldn't believe how thorough it is.One thing about trying to restore and figure everything out on those old scopes is it's all discrete components. From what I've seen, the CRT tube is probably the most complicated individual component. I assume any PCBs will just be two-layer, one on the front and one on the back. I actually love those old large size components, as opposed to today's surface mount components. My eyes have one heck of a time seeing tiny components and trying to solder them.

author: 0culus
author_rank: Super Contributor
timestamp: August 01, 2021, 04:01:39 am
content: Quote from: AaronLee on August 01, 2021, 03:45:43 amAnything from the 500 series will be a lot easier to work on than any portables, tubes and discretes only with PCBs not showing up till the newer ones. There's a few tradeoffs. Weight being a big one. Another one is the the power supplies are considerably more dangerous...350V and higher rails are often fairly low impedance and can source considerable current. Must be treated with respect using good HV work practices. I would personally suggest you work on stuff with less high voltage DC in it, till you have more experience.I suggest a 454 portable:https://w140.com/tekwiki/wiki/454It's the fastest scope Tek made that uses no ICs or hybrids. It's relatively easy to work on, and doesn't have nearly as many dangerous bits.

author: AaronLee
author_rank: Regular Contributor
timestamp: August 01, 2021, 05:56:49 am
content: Quote from: 0culus on August 01, 2021, 04:01:39 amThanks for the recommendation. The 454's are aesthetically a beautiful scope.

author: AaronLee
author_rank: Regular Contributor
timestamp: August 02, 2021, 02:01:36 am
content: I came across this:https://www.ebay.com/itm/114915472895?hash=item1ac17ef5ff:g:UMgAAOSwPhNfgiBW"Oscilloscopes: Selecting & Restoring a Classic by Stan Griffiths"Has anyone seen that book? Would you recommend it for a newbie trying to restore an old Tek scope?

author: Tom45
author_rank: Frequent Contributor
timestamp: August 02, 2021, 05:14:12 am
content: Quote from: AaronLee on August 02, 2021, 02:01:36 amMost of Stan's book is a listing of Tek scopes and accessories from the early days up to 1970 or so. The information on restoring scopes is limited to a chapter or two in the beginning of the book. The introduction to Tekronix, Tek serial numbers, evaluating before purchase, and cleaning and restoring the scopes takes up 42 pages of the 372 pages in the book. The best use of this book is as a reference to be used when considering 500 series tube scopes.Once you have a scope, the manuals available at TekWiki are your best resource. Stan wrote this book in 1992 before the web amounted to anything.

author: 0culus
author_rank: Super Contributor
timestamp: August 03, 2021, 12:29:59 am
content: The tekwiki scans are good in a pinch, but I highly recommend getting an original printed manual instead. There are a lot of them out there, and having the real fold out schematics in hand is *much* better than trying to piece together from a scan.

author: tggzzz
author_rank: Super Contributor
timestamp: August 03, 2021, 08:41:48 am
content: Quote from: 0culus on August 03, 2021, 12:29:59 amThe halfway house is, of course, the Artek manualshttp://artekmanuals.com/Benefits: high quality (600dpi for schematics), arrive within a day, cheap, money back guarantee. I've never considered asking for my money back.