hybridfree/eevblog-posts huggingface dataset:
Tek 1240 Logic Analyzer Manuals - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: July 03, 2013, 04:34:51 am
content: Does anyone need a manual for this logic analyzer? I have a manual for the analyzer and the pods - and the pod one contains a schematic for that hybrid. I believe I even have a spare of the manual, and if I do, I'll sell it cheap. Let me know what you need and I'll see if I can spare it.
TPi 153 Multimeter - Page 1
Forum section: electronics / testgear

author: fqahmad66
author_rank: Regular Contributor
timestamp: April 15, 2013, 06:02:09 am
content: Hi everybody,I am new to this forum. I would like to start by sharing my multimeter. It is TPi 153..been using it for about a year now. So far reliable results. If somebody using the same, please share your experience.Regards

author: codeboy2k
author_rank: Super Contributor
timestamp: April 15, 2013, 06:45:40 am
content: Welcome to the forum.I think you should post here in this thread and enjoy reading about all the multimeters we use, love, loath, take-apart, blow up, and set out on the stairs.https://www.eevblog.com/forum/chat/show-your-multimeter!/

author: retiredcaps
author_rank: Super Contributor
timestamp: July 01, 2013, 05:36:06 am
content: Quote from: fqahmad66 on April 15, 2013, 06:02:09 amCan you show us pictures of the inside?

author: Stonent
author_rank: Super Contributor
timestamp: July 01, 2013, 06:15:46 am
content: Don't turn it on, take it apaaahhhhtt!

author: fqahmad66
author_rank: Regular Contributor
timestamp: July 02, 2013, 12:22:13 pm
content: OK will do it tonight....
building an insulation tester? - Page 1
Forum section: electronics / testgear

author: ftransform
author_rank: Frequent Contributor
timestamp: July 01, 2013, 04:57:51 am
content: So high voltages are easy to generate using a flyback transformer. Has anyone seen any kind of home made high voltage insulation tester? It seems easy enough.

author: kripton2035
author_rank: Super Contributor
timestamp: July 01, 2013, 07:38:02 am
content: here is one :http://www.edaboard.com/thread287707.html#post1230218also june 2010 of silicon chip has an insulation meter inside, that has been copied by epe mag on june 2012 issue
GW Instek usb out =[ - Page 1
Forum section: electronics / testgear

author: thefatmoop
author_rank: Contributor
timestamp: June 29, 2013, 07:19:48 pm
content: I have this GDS-1072A-U and had it connected to the computer doing remote viewing/control. I then pressed the hardcopy button (Save scope screen shot to usb) and a few errors popped up. I unplugged the computer from the scope and now flash drives aren't detected any more. Tried formatting the flash drive, tried different flash drives, tried power cycling the scope. let the scope sit unplugged with the power switch on, tried leaving a fresh formatting flash drive in for a few hours to see if it would eventually recognize. I sent instek a message on their site and will call them if they don't get back to me. Some flash drives occassionally bink in a pattern regardless of what I do.Anyone have similar a similar experience on an instek scope? How is customer support?I would never buy one of these scopes, but my friend dropped out of EE and sold it for a price I couldn't refuse. Not sure why he didn't just buy a cheap rigol...

author: grego
author_rank: Frequent Contributor
timestamp: June 30, 2013, 02:05:38 am
content: If you're in the US Instek support and response is top-notch. Contact the office in Chino, CA and they will probably get back to you pretty quickly.
PD 1570 HV power supply - manual, schematics? Anyone? - Page 1
Forum section: electronics / testgear

author: c4757p
author_rank: Super Contributor
timestamp: June 21, 2013, 07:02:38 pm
content: OK, I just won a Power Designs 1570 high voltage supply on fleaBay - normally I don't buy anything I can't get a manual for, but I got this for $30 + no shipping (local pickup), so I figured I'd go for it. I've been completely unable to find a manual or schematic for this - just a couple little blurbs about its capabilities. Does my Google-fu just suck ass? Does anybody have access to a manual?

author: c4757p
author_rank: Super Contributor
timestamp: June 29, 2013, 02:51:51 pm
content: Oh, I'm going to have to do a teardown with photos and post them. This is a nice-looking piece of kit. It's in good shape, too.Sadly, it uses a pair of large beam pentodes for voltage regulation, and one of them is cracked around the anode cap, so I'm waiting for the replacement to arrive. Plenty of time to clean it up and take pictures in the meantime, I guess. I don't really want to start up a 3kV power supply without cleaning the dust out.It's beautifully simple, too, so I really don't think I need a manual. I might trace out the PCB and get a schematic.I'll probably replace the electrolytic caps as well. 1974 isn'ttoobad, but it's not like they're really expensive.

author: Carrington
author_rank: Super Contributor
timestamp: June 29, 2013, 03:14:41 pm
content: Is like this:http://www-esd.fnal.gov/esd/catalog/main/powerdes/1570-spec.htm

author: c4757p
author_rank: Super Contributor
timestamp: June 29, 2013, 03:25:31 pm
content: Yep, that's it.

author: uoficowboy
author_rank: Regular Contributor
timestamp: June 29, 2013, 05:49:17 pm
content: Interesting - I had wondered how those worked on the insides. Definitely have been thinking about getting myself one.Please post pictures when you have a chance!

author: c4757p
author_rank: Super Contributor
timestamp: June 29, 2013, 07:13:48 pm
content: Added inanother thread.
PD 6050C Question - Page 1
Forum section: electronics / testgear

author: Anson
author_rank: Regular Contributor
timestamp: June 28, 2013, 04:32:04 pm
content: I have a Power Designs 6050C and it works great. My issue is I am not sure if I can get positive an negative at the same time. If you connect it from DC- to DC+ I can get from .1254V to 59,987V and its fairly stable and only drifts the last two digits. So the unit is functioning great at least good enough for my needs. However from ground to either DC+ or - I get no real reading unless I reach back and put resistance from the chassis ground to the shorting bars. Doing this I can get either positive or negative in reference from ground. Not sure if your supposed to do that or not. But I need to be able to feed a circuit +15 and -15V can I do that with this?

author: uoficowboy
author_rank: Regular Contributor
timestamp: June 28, 2013, 10:56:44 pm
content: Quote from: Anson on June 28, 2013, 04:32:04 pmNo, you cannot do that with the 6050C. That is a single channel power supply and you need two channels. If your loads are low current you can use a device like a TLE2426 or even just rig something up with big fat resistors. But ideally you would have a two channel power supply (or two one channel power supplies).

author: Anson
author_rank: Regular Contributor
timestamp: June 28, 2013, 11:23:39 pm
content: QuoteOk, say I got another 6050c How would I hook them up?

author: uoficowboy
author_rank: Regular Contributor
timestamp: June 29, 2013, 05:48:26 pm
content: Quote from: Anson on June 28, 2013, 11:23:39 pmSet them both to 15V. Connect the V- of the first to the V+ of the second. The first's V+ is now your +15V supply, the first V- and second V+ connection is your common (0V), and the second's V- connection is your -15V. Note that you are not using the ground terminal from either supply.Hope this helps!
New Rigol Firmware for DS1102E/D as of April 27 2013 - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: June 20, 2013, 05:17:05 pm
content: Hey Guys and Gals,Just thought I'd let you know that Rigol has a minor technical firmware update for the DS1102E.V00.04.01.00.02.I just bought the scope a week ago and like most things I buy that has firmware in itI always check to see if there is an update.Went to the Rigolna.com and emailed for an update request. Sure enough there was one.Was a snap to install.I live on a fix income so I spent a lot of time researching which under 500USD DSOwould give me the best bang for my buck.Thanks to the EEVblog, Dave's teardowns, and youtube for helping me make the right choice.For 399USD this scope is dope.

author: LaurenceW
author_rank: Frequent Contributor
timestamp: June 20, 2013, 08:24:54 pm
content: Can you tell us (release notes?) what is in the last couple of firmware upgrades?

author: maomi84
author_rank: Contributor
timestamp: June 29, 2013, 07:07:51 am
content: could you give the DS1052E latest firmware V4.01 to me ,I want to upgrade my scopebest regardsTHANKSPLEASE PM
Agilent Handheld DMM firmware and upgrading or changing it... - Page 1
Forum section: electronics / testgear

author: crispytato
author_rank: Regular Contributor
timestamp: June 28, 2013, 01:08:45 pm
content: Hi everyone, I've been watching Daves videos for a long time now but only just registered on the forum now because I had something worth asking about...I've ordered myself an Agilent U1251A multimeter, and I've heard that the B model has firmware updates or enhancements.How would one upgrade the firmware in it, would the usb cable let you do it by serial or something?Either way, I'm really keen to get my new meter, it seems like it's equal or better than the fluke 87-5 in most ways, yet costs a lot less, plus the screen update rate is ridiculous.
Gw Instek oscilloscope screen flicker issue - Page 1
Forum section: electronics / testgear

author: mantu
author_rank: Newbie
timestamp: June 28, 2013, 12:02:09 am
content: Hi there,I am experiencing screen flicker problem with the GwInstek oscilloscope. You can take a look at it the short moviehttp://youtu.be/S8nVNjwVHP4. The symtoms are as follows.1. On first time plugin to the wall outlet and switch on the scope, I here couple of clicks inside the scope but screen does not showup. the system does not bootup. So now I leave the connection on for about 5 mins.2. After about 5 mins, I switch on again, it boots up and enclosed video captures the boot sequence. It first shows the screen properly but once it comes to the main screen it starts flickering showing some horizontal lines tearing the entire screen. It makes it hard to see the waveforms and screen content.Does anybody faced similar issue ?ThanksMahantesh

author: Bored@Work
author_rank: Super Contributor
timestamp: June 28, 2013, 04:58:56 am
content: Try Instek's servicehttp://www.gwinstek.com/en/afterservice.aspxGood luck.
No-name Jameco scopes - Page 1
Forum section: electronics / testgear

author: Stonent
author_rank: Super Contributor
timestamp: June 26, 2013, 08:09:26 am
content: I was looking at scopes on the Jameco website and found some more Siglent clones.SKMIThis one is interesting because it looks like they took a stock Siglent or Atten photo and photoshopped their logo on it because it doesn't seem to match the angle. Sort of an oblique angle but the logo seems straight.http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2126951_-1But then I found a few that didn't appear to be clones of anything I've seen:EZ Digitalhttp://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2145318_-1Uniteqhttp://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2171647_-1They don't resemble any scopes that I've seen, are they still clones or a completely independent brand? They're all way overpriced but was still curious if anyone had encountered these before.

author: mariush
author_rank: Super Contributor
timestamp: June 26, 2013, 08:40:46 am
content: The first one looks like BK Precision 2530b :http://www.farnell.com/datasheets/1301736.pdfThe second one... I've seen the ez/easy something on farnell for sale, so i don't think it's something jameco specific.

author: rf-loop
author_rank: Super Contributor
timestamp: June 26, 2013, 09:26:20 am
content: And in Jameco specs sheet there read(ADS1042CM/C+)http://www.jameco.com/Jameco/Products/ProdDS/2126951.pdfit may mean that it is Atten rebranded for Jameco and originally (perhaps) OEM/ODM made by Siglent for Atten.Btw, Siglent have time ago stopped manufacturing all these 5" TFT models (under Siglent name). Totally obsolete models.

author: bluesmoke
author_rank: Contributor
timestamp: June 26, 2013, 08:26:22 pm
content: $600 for a poor 40MHz scope! Do they actually sell any?

author: Bored@Work
author_rank: Super Contributor
timestamp: June 26, 2013, 09:19:32 pm
content: Quote from: mariush on June 26, 2013, 08:40:46 amIt is the former Goldstar/LG Precision. They go spun off as EZ Digital. And then AFAIK disappeared. Maybe someone bought the brand or it is old stock.

author: Stonent
author_rank: Super Contributor
timestamp: June 27, 2013, 04:13:52 am
content: Quote from: bluesmoke on June 26, 2013, 08:26:22 pmI'd bet they make a lot of their money on standing relationships with clients. I.E. I run a firm that has always bought stuff from Jameco for whatever reason etc.
could be of interest, Oz Ebay Brymen BM869  - Page 1
Forum section: electronics / testgear

author: staxquad
author_rank: Frequent Contributor
timestamp: June 27, 2013, 12:20:53 am
content: starts at $199AUD, started at $299 last week and didn't sell ($183US, wtf happened to the Oz dollar? it was up on the USD for a long time)free local pickup, Frankston, VIC, Australiahttp://www.ebay.com/itm/Brymen-BM869-Digital-Multimeter-True-RMS-1-000V-CAT-IV-Rated-500-000-Counts-/130936296615?pt=AU_B_I_Electrical_Test_Equipment&hash=item1e7c6954a7

author: Stonent
author_rank: Super Contributor
timestamp: June 27, 2013, 12:24:31 am
content: Last I checked 1.00 American bought 1.05 AUD. For a lot of stuff Dave quotes in his videos as dollars or bucks,(I assume meaning AUD in both cases) I'm finding prices being fairly consistent with US Pricing.

author: staxquad
author_rank: Frequent Contributor
timestamp: June 27, 2013, 12:31:53 am
content: Quote from: Stonent on June 27, 2013, 12:24:31 amHad to take a peek. Looks like it went bad around the 10th of May this year

author: Stonent
author_rank: Super Contributor
timestamp: June 27, 2013, 12:48:19 am
content: I just checked XE for todays numbers1.00 USD = 1.07647 AUD1.00 USD = 1.04645 CAD1.00 CAD = 1.02900 AUD1.00 AUD = 0.971817 CADWe'd better keep this a secret, we certainly don't want (insert the name of government official you don't like) to try to fix it.
Rigol DS 1052E Hack - Page 1
Forum section: electronics / testgear

author: tazelikechickn
author_rank: Regular Contributor
timestamp: July 06, 2013, 07:07:18 am
content: I recently saw Dave's video on the Rigol DS 1052E Hack. Great news!!!I use a Picoscope laptop based in my automotive job, but the Rigol seems just what I need at home to do my new love interest - electronics!One problem I am having is trying to get the drivers for the oscilloscope. I have tried on the supplied CD and checked on the Rigol site, but nothing seems to work. I have downloaded Hyperterminal, but it doesn't seem to comunicate where it needs to.I have read other forums that say others have had similar problems, but I can't see where someone has explained it clearly (like you would speak to a 2 year old!!)Can anyone help me to get the drivers and anything else I need to get my 50MHz beefed up to the 100MHz scale?

author: ant452
author_rank: Newbie
timestamp: July 06, 2013, 09:00:52 am
content: Check out:https://www.eevblog.com/forum/blog/changing-the-rigol-ds1052e-to-ds1102e-using-usb-the-dummy-guide/1200/recent news seems that the upgrade can be done simply via USB.But take your time read everything first, may not work with all HW versions, might depend on your current SW etc.
HP Grabber Probe Part Number - Page 1
Forum section: electronics / testgear

author: dexters_lab
author_rank: Unknown
timestamp: June 25, 2013, 10:12:22 pm
content: I am trying to identify the HP part number for these grabbers, i cant seem to find it anywhere, any ideas?.I wanted to list a few of these on ebay as i dont need all of the ones i have so it would be nice to get the part number for the listing.
You ought to enter the link inside - 3458A VS fluke 8508A VS Keithley 2002  - Page 1
Forum section: electronics / testgear

author: eevblogfan
author_rank: Frequent Contributor
timestamp: June 24, 2013, 08:23:44 pm
content: heyplease share with me the thought you raise just when you find the problem(s) with that Linkhttp://dmm.findthebest.com/compare/10-29-168/Keithley-2002-vs-Agilent-3458A-vs-Fluke-8508APs. is it equipment related or general stuff related ?

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: June 24, 2013, 09:07:33 pm
content: Hi,From the information in the table I am thinking of buying the Fluke.I like the Operating temperature range -200 to + 661 C (handy with Global warming)But I am not sure about the DC accuracy of +/- 4%Maybe the dc accuracy is stated over the full operating temperature range.I ruled out the Keithley 2002 because the DC current accuracy is 1000%. I can already achieve 200% with a few turns of wire wrapped around a compass.All I can say is 'Wow ! that's Fantastic' or in the modern languageI guess they need some one to do some proof reading.Jay_Diddy_B

author: Unknown
author_rank: Unknown
timestamp: June 24, 2013, 09:19:00 pm
content: I'm impressed. They got very little right, even trivial stuff like if the Keithley supports resistance. The 1 ppm spec for the 3458A AC current is impressive! I guess this was either created by a clueless person or some misguided AI algorithm attempting to analyze the datasheet.

author: plesa
author_rank: Frequent Contributor
timestamp: June 24, 2013, 10:13:04 pm
content: In attachment is good comparison.I`m not sure if the website will give someone useful data for purchase. It is more for some cheap DMM, not for these high-ends.

author: quarks
author_rank: Frequent Contributor
timestamp: June 25, 2013, 05:38:17 am
content: A lot of the shown data is unfortunately wrong. I wish at least the 8508A price would have been close, but when I searched for one, in Germany they asked for about 20k€ incl. Tax.

author: free_electron
author_rank: Super Contributor
timestamp: June 25, 2013, 11:09:56 am
content: Quote from: plesa on June 24, 2013, 10:13:04 pmNah. That test is flawed. The hp is clearly heavier so it should win that category. Its also larger so it should win there too , and it also costs more, so it should win there tooHP :Heavy ProductsHigh PriceHigh Performance
Saelig listing DS1052E as no longer available - Page 1
Forum section: electronics / testgear

author: Stonent
author_rank: Super Contributor
timestamp: June 24, 2013, 11:23:22 pm
content: I was looking at Saelig and they show the DS1052E as no longer available and point you to the 1102E.http://www.saelig.com/PSBEB100/PSPC016.htmI wonder if that means a new low end scope is on the way or if the 1102E is just now their low end. Or maybe Rigol is going to try to make up for the sales of the 1102E sales lost due to everyone hacking their 1052E?This may be absolutely nothing but it gives us something to speculate about. The Rigolna.com site still shows it available at $329 USD.

author: c4757p
author_rank: Super Contributor
timestamp: June 24, 2013, 11:25:55 pm
content: They explained themselves a while ago, I think in a newsletter. The 1102E had gone down in cost so much that they didn't think it was worth it to stock or buy the half-bandwidth but more-than-half-cost 1052E.

author: Stonent
author_rank: Super Contributor
timestamp: June 25, 2013, 12:47:01 am
content: A saelig newsletter or rigol?

author: c4757p
author_rank: Super Contributor
timestamp: June 25, 2013, 12:48:49 am
content: It'd have to be Saelig, I don't get a Rigol one. I tried to find it but I think it's been returned to the bit bucket.
HP 3311A Function Generator - Low Amplitude at above 4k - Page 1
Forum section: electronics / testgear

author: jonese
author_rank: Contributor
timestamp: June 26, 2013, 11:52:53 pm
content: I have an old HP 3311A in pretty good condition cosmetically that has a problem where the amplitude slowly diminishes to zero starting around 4 KHz, no matter what waveform is selected. The Pulse Output is fine, it holds up across frequencies (btw there is quite a bit of ringing). The problem persists across multiple range selectors.Looking at the manual troublshooting guide, they suggest it's the output amplifier is the issue and references Schematic No. 1. Trouble is, all electronic copies of the manual are illegible in respect to section 7 that contains the troubleshooting tree and schematics.Anyone know of the decent scan of section 7?
Seller "refurbished" HP3615A - Page 1
Forum section: electronics / testgear

author: reagle
author_rank: Unknown
timestamp: June 22, 2013, 02:59:39 pm
content: I wonder if the refurbishment process involved smacking the poor thing with a hammer a few times?!!http://www.ebay.com/itm/AgilentHP-E3615A-60Watt-DC-Power-Supply-/370840306906

author: Uup
author_rank: Regular Contributor
timestamp: June 22, 2013, 04:01:06 pm
content: Hammer? Worse... looks like it was dropped!

author: c4757p
author_rank: Super Contributor
timestamp: June 22, 2013, 04:07:03 pm
content: Doesn't look that bad. I'd guess the refurbishment process involved checking it over for damage from whatever did that, and perhaps repairing. If it were a bit cheaper (and I were in the market for a PSU) I'd buy it.Actually removing the dents from the case would be quite difficult to do right, and it doesn't affect operation, so...

author: reagle
author_rank: Unknown
timestamp: June 22, 2013, 06:27:03 pm
content: Quote from: c4757p on June 22, 2013, 04:07:03 pmI know, it still seems a bit funny. I'd probably list it as used.

author: Unknown
author_rank: Unknown
timestamp: June 23, 2013, 02:14:14 pm
content: I won't risk....P.s: much interesting the logic analyzer he have:http://www.ebay.com/itm/Agilent-HP-54620A-Logic-Analyzer-/370837640071?pt=LH_DefaultDomain_0&hash=item5657a55387#shIdfor $400.... Don't know if he he have the probe....

author: lowimpedance
author_rank: Super Contributor
timestamp: June 23, 2013, 11:42:09 pm
content: Wonder what the 'before refurbisbishment' photo's are like.
Fluke 73 , Ohm Autranging at 30MOhm, faulty or not ? - Page 1
Forum section: electronics / testgear

author: JuergenB52
author_rank: Contributor
timestamp: June 21, 2013, 06:29:19 pm
content: Hi,i have an old Fluke 73, it reads all Voltages, Ohm, Currents, etc fine.But if i set it to Ohm and do not connect any test leads, it´s autoranging.It starts about 10MOhm and climbs up to 30MOhm.My Fluke 179 or 77 Show O.L MOhm.Is this a normal behavior for the Fluke 73 series?The 1kOhm fusible has been exchanged.ThankJürgen

author: Excavatoree
author_rank: Frequent Contributor
timestamp: June 21, 2013, 06:52:29 pm
content: Typically, the 73 should also show OL. I'd check the board for contamination or carbon traces, and check the input MOVS.

author: JuergenB52
author_rank: Contributor
timestamp: June 22, 2013, 12:57:43 pm
content: Hi,i checked the MOV´s and i removed them, and cleaned the PCB.Directly after cleaning the PCB around the Input Jacks with isopropanol alcohol it goes down to 1MOhm,after a while it starts with OL and goes down to 25-31MOhm.Can the Rotary Switch be faulty?Thanks for the help

author: ModemHead
author_rank: Frequent Contributor
timestamp: June 23, 2013, 08:36:37 pm
content: Turn the board over and look for the QFP analog processor on the bottom nearest the input jacks. Use something fairly sharp and drag it between all the pins. Don't press hard enough to damage anything, just make sure there is no crud or contamination between the pins. Then re-clean it vigorously with a brush and IPA. Allow to dry thoroughly. IPA may collect under the chip. Blow it out and/or warm it gently under a lamp.
Scope Companion amplifier - Page 1
Forum section: electronics / testgear

author: lgbeno
author_rank: Frequent Contributor
timestamp: June 23, 2013, 06:54:38 pm
content: So talking about ds2072-s on a separate thread got me thinking. Would be a cool project to design a companion board to the scope that could convert the arbitrary voltage signal to a current sort of like a source measure unit. Of course it's not as accurate as a proper unit but would still be neat.Some possible feature would be:V to I conversion, arb sets current, scope measures voltage.Arb voltage buffer. Basically use the arb to set the voltage of a buffered output capable of supplying up to a few hundred mA. Scope measures current via a uAmp like circuit.Amplifier compression analysis, capture power vs frequency and gain vs frequency plots.Frequency mixing...Thoughts?
Trying to get readings out of an Agilent 86140B - Page 1
Forum section: electronics / testgear

author: Arp
author_rank: Unknown
timestamp: June 19, 2013, 07:03:02 pm
content: Found a spectrum analyzer in the garbage bin at work.I managed to fix the LCD by replacing the floro with a led strip.Been trying to get readings out of it, but unable to get any reaction whatsoever. It keeps showing the same reading as on the picture, no matter how much I fondle with the fibers or send light with flashlight and laser pointer.Before I use it for scrap parts, any thoughts on what might be wrong with it?

author: Orange
author_rank: Frequent Contributor
timestamp: June 19, 2013, 09:16:02 pm
content: If you don' t get errors during the self test it's probably OK. Shining with a laser pointer or flashlight does not work, you need more power.You need to connect a proper fiber with source to see if it is working. It's most likely OK, so don't scrap it, that would be a waisteThis system has probably a semiconductor laser for the interference measurement. If the laser or receiver would be bad, you would get errors during the stat-up phase of the instrument. I don' t know the 86140A, only the 86120B. The 86120B is less sensitive and has a HeNe laser.

author: Arp
author_rank: Unknown
timestamp: June 23, 2013, 05:59:54 pm
content: I couldn't help but opening up some of the modules. Pretty interesting mechanical stuff going on inside. A rocking mirror in the big metal cube, rocking to the sweep. In the unit connected to the input some kind of circular plate with small holes. When I changed the bandwidth it spun.Still nothing happened to the readings on the display while doing this. Not even a speck of noise.Will borrow some fiber and a stronger source to test it with before it goes to the grinder
Triplett 4800 schematics - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: June 24, 2013, 04:04:20 pm
content: A very nice support person over at Triplett (I think she had a halo and wings) sent me the schematics for the triplett 4800. As it's way old and EOLed, I'm going to post them here in case someone else finds them useful. If someone gets the bug, I'd appreciate a general idea of its quality based on the schematic. Here goes.
Oscilloscope with Component Tester and Function Generator - Page 1
Forum section: electronics / testgear

author: zaoka
author_rank: Frequent Contributor
timestamp: June 22, 2013, 11:25:21 pm
content: Is there any oscilloscope on the market that has both; Component Tester and Function Generator Built In?THanks

author: Hydrawerk
author_rank: Super Contributor
timestamp: June 22, 2013, 11:50:48 pm
content: Probably not if we talk about new currently sold scopes.

author: Stonent
author_rank: Super Contributor
timestamp: June 22, 2013, 11:53:22 pm
content: Something useful like that would certainly hurt their profit margin they'd get from selling you 3 tools!Though it would make it more difficult to sell because your needs for an oscilloscope may not be the same as a function generator.Also aren't most function generators ridiculously expensive?
HP 1630G Logic Analyzer - Page 1
Forum section: electronics / testgear

author: dexters_lab
author_rank: Unknown
timestamp: June 24, 2013, 08:53:05 pm
content: Picked up another Sunday evening Ebay purchase today, HP 1630G Logic Analyzerbought just to take apartso will probably pull it apart over the next few days and see whats inside, tbh i suspect there wont be too much interesting in it but i dont care, i just enjoy doing itCame with a disposal document from Marconi dating from 2000 which also shows it's original purchase date and price of £28,560.00 (GBP) in 1991. Will have to see how this date checks out with the internals.Only seemed to have one set of cables with it even though it's supposed to be 64 channel (the probe pods are all there) but came with 33 hp branded mini grabbers and 13 mini clips, perfect... i was just about to buy some cheap ones off ebay as well
Tripplett 4800 - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: June 15, 2013, 07:11:52 am
content: I just bought a Tripplett 4800 for $25 on ebay. It seems to have a lot of capabilities that my tenma doesn't (though I like the tenma and plan on keeping it). I thought the price was great no matter what, but I'm curious about your thoughts.The seller said that most functions work, but the buttons are getting hard to press, so I figure that should be something that's not too difficult to fix or retrofit.

author: Bored@Work
author_rank: Super Contributor
timestamp: June 15, 2013, 07:31:34 am
content: After a quick look at the specs I'd say $25 for that thing is a steal - if it works.That thing has some funny features, like an auxiliary 12V, 50mA power supply output, comparator relay output or an input for a touch and hold probe. And it has a resolution down to 10uV DC and 10nA DC. Nice!Edit: Specs say it has an internal battery. Second thing I would do is to check that battery (first thing would be to have a look at the power supply caps, just in case).

author: Unknown
author_rank: Unknown
timestamp: June 15, 2013, 03:06:13 pm
content: Yeah, I hope it works or is repairable, looks like a good piece of equipment to add to the bench.

author: Unknown
author_rank: Unknown
timestamp: June 21, 2013, 11:49:28 pm
content: So I received it today, and put it through its paces. Few of the buttons worked. On taking it apart, I found that the carbon on the buttons had worn out. One trip to home depot and some aluminum foil tape later, and works a treat, as Dave would say.I like it! Beauty!

author: zaoka
author_rank: Frequent Contributor
timestamp: June 22, 2013, 03:17:37 am
content: Can you upload some pictures or small review?

author: Unknown
author_rank: Unknown
timestamp: June 22, 2013, 03:18:36 am
content: Yes, sure. I'll start a new thread for that.
TTi QL series power supplies service manual or info wanted - Page 1
Forum section: electronics / testgear

author: Rufus
author_rank: Super Contributor
timestamp: June 21, 2013, 03:01:16 am
content: Anyone got or seen one?Calibration procedure detail would be interesting although I have mostly figured it out.

author: ElektroQuark
author_rank: Unknown
timestamp: June 21, 2013, 07:16:33 am
content: Ask TTI directly, they have an awesome support.
Fluke DMM test Leads  - Page 1
Forum section: electronics / testgear

author: Bryan
author_rank: Frequent Contributor
timestamp: June 20, 2013, 08:09:42 am
content: Ok, dumb question, but what are the lantern tips used for on the Fluke multimeter leads. Was looking to purchase the TL224 leads and a pair of TP175 Probes. The probes come with lantern tips, what are they used for??

author: iloveelectronics
author_rank: Frequent Contributor
timestamp: June 20, 2013, 08:21:25 am
content: For turning the probes into banana plugs.

author: Bryan
author_rank: Frequent Contributor
timestamp: June 21, 2013, 01:40:13 am
content: Aah, thanks, so one could add accessories on the end that accept a banana plug connection.

author: iloveelectronics
author_rank: Frequent Contributor
timestamp: June 21, 2013, 02:07:41 am
content: Yes, or you could take stable measurements from devices equipped with banana jacks, such as power supplies.
Can you view the capture rate on the DS1052/1102? - Page 1
Forum section: electronics / testgear

author: alank2
author_rank: Super Contributor
timestamp: June 20, 2013, 05:56:18 pm
content: Hi,On my DS1022CD I can see the capture rate under the acquire menu at the bottom, but on the DS1102 it offers the sin/x option in that spot. Is there another place you can see this information (the capture rate) on the DS1052/1102?Thanks,Alan

author: alank2
author_rank: Super Contributor
timestamp: June 20, 2013, 06:02:00 pm
content: Nevermind - found it under the horizontal menu...
ESR Meter - Page 1
Forum section: electronics / testgear

author: akanowitz
author_rank: Contributor
timestamp: June 20, 2013, 11:55:03 am
content: Hi Guys,This is a desperate attempt and trying to get an ESR meter at a reasonable cost in Australia. Any recommendations or advice appreciated.ThanksAlan

author: notsob
author_rank: Frequent Contributor
timestamp: June 20, 2013, 12:10:22 pm
content: 1. define 'reasonable'2. change your profile to show your country as oz

author: akanowitz
author_rank: Contributor
timestamp: June 20, 2013, 12:18:42 pm
content: HiThanks for that , did not realize my profile was not complete, I would say willing to spend up to about $200 on a unit.RegardsAlan

author: kripton2035
author_rank: Super Contributor
timestamp: June 20, 2013, 12:29:05 pm
content: (almost) all about esr meters on my web site (url below)

author: akanowitz
author_rank: Contributor
timestamp: June 20, 2013, 12:36:11 pm
content: Do you have any opinions on the Lutron LSR-9183?

author: notsob
author_rank: Frequent Contributor
timestamp: June 20, 2013, 12:50:07 pm
content: There's kriptons great references, already listed.Also there's the copy of bob parker's unit - used to be sold by dick smith before DS became just another trumped up retail storehttp://www.anatekcorp.com/blueesr.htmand an analog display one, kit available from aztronics - adelaidehttp://www.users.on.net/~endsodds/esr.htmand the commercial ones, but they will cost a lot more then your budget.

author: don.r
author_rank: Frequent Contributor
timestamp: June 20, 2013, 12:59:10 pm
content: There is this one, I have no idea if it's ok or not:https://www.eevblog.com/forum/testgear/mesr-100-esr-meter/

author: Wytnucls
author_rank: Super Contributor
timestamp: June 20, 2013, 01:02:03 pm
content: Proper LCR meters aren't that expensive, if you don't mind Chinese manufacture:CEM DT9935 or UNI-T UT612, both cost about USD150.00, including free shipping.http://www.ebay.com/itm/Brand-CEM-9935-Professional-LCR-Digital-Multimeter-Safety-10-100KHz-L-C-R-D-Q-/280936728409?pt=LH_DefaultDomain_0&hash=item4169224759http://www.ebay.com/itm/UNI-T-UT612-Multi-purpose-LCR-Meter-Inductance-Capacitance-L-C-R-DCR-Q-D-ESR-/190829239455?pt=LH_DefaultDomain_0&hash=item2c6e4f1c9f
M3 / MCubed transistor tester , info ? - Page 1
Forum section: electronics / testgear

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: June 19, 2013, 02:14:59 pm
content: I saw one for sale the other day and went looking for info , looked good , but now sold .http://www.wa0itp.com/mcubed.htmlhttp://www.n5ese.com/m3_sa.htmSo not trying to see if there is enough info out there to build one etc. ?The company does not seem to be around anymore .

author: grenert
author_rank: Frequent Contributor
timestamp: June 19, 2013, 03:39:56 pm
content: Yes, the company is kaput nowI don't think you could do much with just a schematic, since the microprocessor does so much work. I know that their LCR meter was designed by a Frenchman who sells it in France under a company named MW Instruments, which still exists the last time I checked. I think he may have done the transistor tester as well.

author: eKretz
author_rank: Frequent Contributor
timestamp: June 19, 2013, 03:46:15 pm
content: Yeah, sucks. I wish they still sold the kits. The guy in France's website says he won't sell outside France.

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: June 19, 2013, 05:28:30 pm
content: How about a link , I did a quick google , but did not find ?Maybe I could get someone to send to me from a place they will ship ?Thanks

author: madworm
author_rank: Frequent Contributor
timestamp: June 19, 2013, 05:30:41 pm
content: I'm sure you meant to say:"Maybe I could get someone to send tousfrom a place they will ship ?"

author: eKretz
author_rank: Frequent Contributor
timestamp: June 19, 2013, 05:34:26 pm
content: Right on,usindeed! Haha! Sorry, should have posted the link in the last post:http://mwinstruments.com/I'm not sure if he still sells kits or only completed testers, I didn't bother using google translate once I saw he wouldn't sell outside France. I have seen positive remarks regarding the LCR tester he offers also.

author: madworm
author_rank: Frequent Contributor
timestamp: June 19, 2013, 05:47:46 pm
content: http://www.qrp-shop.biz/epages/qrp-shop.sf/en_GB/?ViewObjectID=3649980Ships world-wide.

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: June 19, 2013, 06:09:59 pm
content: Looks good thanks guys .

author: eKretz
author_rank: Frequent Contributor
timestamp: June 19, 2013, 06:26:49 pm
content: Cool, still available! I just wish they still had the kits!!!! And that they offered the others that they used to also.
Lecroy 9400A Options  - Page 1
Forum section: electronics / testgear

author: Ziltoid
author_rank: Contributor
timestamp: June 25, 2013, 12:58:01 pm
content: Hi, i have a 9400a and thought FFT would be nice to have. So i want to add them. For the 94xx you have a gal to program in the 9400 you have to rewrite the eprom.There are 8 rom (6x 7256 2x 2716b) on the board, does somebody has the bin files with the options enabled, and has some information on how to do it? In the Yahoo Group are files for the 9400 but i dont think these are the same.Thanks!In the Lecroy Yahoo Group i found the post below.Quote
recommend DMM up to 200€ - Page 1
Forum section: electronics / testgear

author: mladen82
author_rank: Contributor
timestamp: June 15, 2013, 09:25:48 pm
content: Hello to all!Couple days ago i burnt Extech EX470 DMM by measuring some high voltages.So i must buy new handheld digital multimeter , price up to 150-200 euros.I am electronic technician, repairing lcd monitors, laptops, printers, scanners, faxes, power supplies, UPS and other electronics related equipment.It is important that the DMM along TRUE RMS measurement of voltage and current, and resistance measuring with diode testing, also havetemperature measurement. Well, it will be good if also can measure frequency, with some decent bandwith if possible.I don't need capacitance and inductance measurement and aditional parameter like ESR meter as i have LCR200 meter by Extech that have all that.Very interesting to me are Agilent products but i want more recommendations, so freely drop some opinions.Thanks in advance.

author: Fsck
author_rank: Super Contributor
timestamp: June 15, 2013, 09:31:39 pm
content: BM869 is 180 euroes from tme.eu, should have everything you want and even has support for 2 simultaneous temps. I've got one and I love it.

author: Lightages
author_rank: Unknown
timestamp: June 15, 2013, 09:39:07 pm
content: The simple answer is one of these:Brymen BM869https://www.eevblog.com/forum/testgear/brymen-bm869-short-review/Easily obtained here:http://www.tme.eu/en/details/bm869/portable-digital-multimeters/brymen/#and you can get a data cable for it for computer logging.or if you want less accuracy and longer internal logging:Brymen BM525http://www.tme.eu/en/details/bm525/portable-digital-multimeters/brymen/#You cannot go wrong these. They are both CATIV/1000V, as high as it gets, built like tanks, and have very good input protection against high voltage. I tested my BM869 to 5000V and it still works perfectly. I like mine so much I purchased a BM257 to have as a smaller "toolbox" meter and I am considering buying a BM525 for the high speed standalone long recording/logging.

author: mladen82
author_rank: Contributor
timestamp: June 18, 2013, 11:49:09 am
content: Ok, thanks you for recommendations.if anyone else can suggest...?
Question about PicoScope 2104 - Page 1
Forum section: electronics / testgear

author: zaoka
author_rank: Frequent Contributor
timestamp: June 17, 2013, 06:06:16 pm
content: Will this work to detect ripple noise on ATX power supply? By ATX standards 50mV/PP is maximum for 5V and 120mV/PP for 12V rails.Is it isolated?http://www.picotech.com/document/datasheets/PicoScope2100.pdf

author: jpb
author_rank: Super Contributor
timestamp: June 17, 2013, 08:00:59 pm
content: Picoscopes have a lot of good features but for what you want to do they may not be ideal.Firstly, I don't think that it is isolated because it needs to communicate via USB so its ground point is that of the USB ground. Secondly they don't have as large a voltage range as standard scopes - they are limited to 20V I think though they are protected against higher voltages.That particular model is cheap and handy to use but only has one channel which you may find rather limiting.Having said that, most scopes are grounded rather than floating unless you power them from an isolating transformer which is probably not a good thing to do - better to power the device under test that way. And you're only wanting to look at 5V and 12V rails so the 20V limit won't be that restrictive.

author: zaoka
author_rank: Frequent Contributor
timestamp: June 17, 2013, 11:12:07 pm
content: This was for onsite PC repair tech, its handy for carrying thats all.

author: kiss_eng
author_rank: Newbie
timestamp: June 18, 2013, 04:34:55 am
content: For isolation you can just run it off a laptop with a battery.
Unilab 032.601 - Page 1
Forum section: electronics / testgear

author: Noldir
author_rank: Newbie
timestamp: June 17, 2013, 09:18:11 pm
content: Hi there,Anyone got any experience with one of these? I can't find any manuals online and the seller doesn't know much about it either.Im planning to use it to repair some vintage cassettedeck. Nothing exciting but wondering if it's something that'll see me over till I can afford something a bit better-Rob
Ever seen one of these? - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: June 17, 2013, 06:07:41 am
content: http://www.ebay.com/itm/Transistor-Diode-Capacitor-Tracker-Curve-Tracer-Electronic-Component-Tester-/151051471921It looks like a neat little gadget that someone designed and built themselves. I'm not sure if I would have a use for one yet, but some of you might.

author: digsys
author_rank: Unknown
timestamp: June 17, 2013, 06:27:12 am
content: You'll find that many of the "older" members here grew up with curve tracers (we didn't have many other resources back then).The Elektor design was / is? one of the best, that one has pretty average "curves".There's many threads on this forum on the subject, should you have more interest.

author: Unknown
author_rank: Unknown
timestamp: June 17, 2013, 06:34:03 am
content: Ahh, interesting. Always something new to learn.Way too much, actually.

author: Drhappyness
author_rank: Newbie
timestamp: June 17, 2013, 07:09:04 am
content: i think for same price you can buy analog oscilloscope with same functionality , component test feature

author: notsob
author_rank: Frequent Contributor
timestamp: June 17, 2013, 07:33:12 am
content: It's an 'octopus' been used for eons, google 'octopus'

author: edpalmer42
author_rank: Super Contributor
timestamp: June 17, 2013, 04:20:52 pm
content: Huntron Tracker is the best known commercial version of this. It's been around for 10 or 20 years.Ed

author: Hydrawerk
author_rank: Super Contributor
timestamp: June 17, 2013, 04:28:41 pm
content: Quote from: Drhappyness on June 17, 2013, 07:09:04 amYes, it is a standard feature on most analog or digital Hameg scopes since late 1980s or so.

author: PA4TIM
author_rank: Super Contributor
timestamp: June 17, 2013, 04:54:57 pm
content: http://www.pa4tim.nl/?p=1437this one I made some time ago.Also once made an octopus.I know own a sort of hurton tracer copy from vu-data. And my pride is a Tektronix 576, the king of curve tracers but that is a total different class. It can do things like 1000V and 10A, you can do a lot more with a CT then most people know. Besides testing semiconductors you can measure ESR, zap nicads, charge batteries, test volt/temp coöfficients, match components, with some additional things you can even test tubes.

author: PhilNY
author_rank: Contributor
timestamp: June 17, 2013, 05:54:16 pm
content: Here on page 27 of Tektronix's "The XYZs of using a scope" is an easy one to build for cheap, plus some good scope tips.Philhttp://njarc.org/books/XYZs%20of%20Using%20a%20Scope/XYZs_of_Using_a_Scope.pdf

author: jebcom
author_rank: Regular Contributor
timestamp: June 17, 2013, 06:07:05 pm
content: QuoteIf you have such a scope for $60, I think I'd like to buy it from you.
Rigol DS2202 possible bug. - Page 1
Forum section: electronics / testgear

author: zener
author_rank: Contributor
timestamp: June 15, 2013, 04:00:21 pm
content: I have a DS2202 with the original firmware 00.00.1. I was trying to set the 2 GSa/s sample speedand the 14 Mpts buffer depth. If I set sweep speed to 500uS I can get it on chan 2 but not chan 1.This is, of course, with only one channel enabled at a time. I turn on chan 1 (only) and it says1 GSa/s and 7 Mpts. If I change it to chan 2 (only) it says 2 GSa/s and 14 Mpts. Am I doingsomething wrong? Why don't both channels operate in the same manner?If I enable both channels I get 1 GSa/s and 7 Mpts as expected.Thanks,Pete.

author: egonotto
author_rank: Super Contributor
timestamp: June 15, 2013, 04:35:28 pm
content: Hello,I think this is no error. I think your triggersource is ch2.If ch1 is the only chanal you have to set the triggersource to ch1. Then you will have what you want.Best Regardsegonotto

author: zener
author_rank: Contributor
timestamp: June 15, 2013, 04:43:46 pm
content: Yes, that is it! I am happy to learn something new.Thanks,Pete.

author: PA4TIM
author_rank: Super Contributor
timestamp: June 17, 2013, 05:47:12 pm
content: Chinese scopes have no bugs, only features

author: SeanB
author_rank: Super Contributor
timestamp: June 17, 2013, 05:55:57 pm
content: Quote from: PA4TIM on June 17, 2013, 05:47:12 pmAnd mostly undocumented ones at that.At least is did not do what is so common and blow up. I saw one comment on an exploding Chinese chair that asked if there is anything Chinese made that does not blow up at some point or the other.
Affordable FRA (Frequency Response Analyzer) for power supplies - Page 1
Forum section: electronics / testgear

author: rbola35618
author_rank: Frequent Contributor
timestamp: June 17, 2013, 02:57:11 pm
content: I found an affordable FRA on the Cleverscope website. I think this is a game changer for those that are interested in a FRA. Most of the FRA out in the market cost between 5K to 30K. The Cleverscope is a fraction of its competitors at 1500. This is well within my budget.
Philips PM 3305 analog + memory oscilloscope 1986 - inside photos - Page 1
Forum section: electronics / testgear

author: jancumps
author_rank: Unknown
timestamp: June 16, 2013, 10:54:03 am
content: While working on this Philips oscilloscope of 1986 (based on the newest component date, they range from 1980 for the Intel parts to 1986 for the 74xx ICs), I took pictures of the insides.You can see the scope is from a different era. Loads of prints and components fighting for the space next to the CRT. It is a hybrid model, an analog scope with sampling and digital storage. There is no menu and it does not show measurements on screen. My scope has the IEEE bus extension installed.The scope is 2 channel in analog mode, and 4 channel in digital (there are two extra channels C and D with limited functionality on the back of the scope.When using its capability to freeze an image of the 4 digital channels and playing with the Y position, you can show and compare up to 8 signals (4 from memory, 4 realtime).The scope is showing its age. The power supply failed last year, and the time base is starting to develop issues.