Short horizontal trace line on analog scope - Tek 465b - how to make it longer - Page 1
Forum section: electronics / testgear

author: ez24
author_rank: Super Contributor
timestamp: July 14, 2016, 07:59:16 pm
content: HiI may be looking at a Tek 465b scope tomorrow. The ad shows the trace about 2 inches wide centered on the screen, ie it did not go all the way to the right nor to the left. The seller does not know how to use it.This sell is starting to smell (lots of text messages delaying me from buying it - 5 days now). Tomorrow I am suppose to go there (it will be my last attempt).I do not have an analog scope to test the settings. What should the settings be (with no input - I do not want to hook up the probes) to see the trace go across the screen?I want to ask seller to set them and send me a video and take delivery out in the street if the trace goes from side to side. I do not think there is a place to park near, I would have to park far away, and carry it about 1,000 feet and that would be hard for me to do.I do not think that it is stolen. I have his phone number and it comes up in google with no problems, and his address. But he will not talk on the phone (maybe he does not speak English). The ad ran for weeks. It is possible he is very busy, but still strange. It is also possible he does not need the money. Also the scope comes with a lot of goodies, like real Tek probes, manuals, CD ?, things I do not know, etc. It is $200 which might be the reason the ad has been running for weeks.The ad is gone so I cannot link to it and I forgot to copy it. It ran for weeks showing the serial number.Summary : I would like to tell him how to set the knobs to make the trace go from side to side, and ask him to take a video and send it to me, then meet me on the road with it.thanks

author: alsetalokin4017
author_rank: Super Contributor
timestamp: July 14, 2016, 09:50:19 pm
content: I suggest you download the 465B operator's manual (available from many sites, google is your friend) and look in the first chapter for the basic settings. This is not really a "beginner's" analog scope, it has dual timebases and other complexities. I should think that you _do_ want to connect probes to the inputs to see if it will display its probe calibrator signals properly. The short trace on the ad photo could be something as simple as an interaction between the camera's shutter speed and the scan rate of the scope (no problem), or it could indicate a real problem in the scope's internals.Nothing beats an in-person checkout. If the seller does not know how to operate the scope properly, it is not likely that you will be able to describe how to do it over text-messages.As far as carrying it 1000 feet-- get yourself a simple, cheap "wheelie" set from a luggage or department store.

author: klunkerbus
author_rank: Unknown
timestamp: July 14, 2016, 10:03:17 pm
content: A short horizontal trace could also be as simple as the beam finder button in the on position. Beyond that, yeah, the dual timebase can lead to this - particularly the A-intensified-by-B mode.

author: AF6LJ
author_rank: Unknown
timestamp: July 14, 2016, 10:07:31 pm
content: It would have helped to see a picture of the front of the scope, the controls can be set to yield a short trace on the display.

author: tautech
author_rank: Super Contributor
timestamp: July 14, 2016, 10:13:05 pm
content: Quote from: klunkerbus on July 14, 2016, 10:03:17 pmYep, with the Intensity of the trace turned down one could be mislead into thinking there was something wrong with the scope in that mode.Familiarity with the UI and knowing how to drive a CRO will soon discover if there's really a fault with it or not.

author: ez24
author_rank: Super Contributor
timestamp: July 14, 2016, 10:59:14 pm
content: Quote from: alsetalokin4017 on July 14, 2016, 09:50:19 pmFound the manual by searching this forum (after trying google) and unfortunately it says to hook up a signal. Anyway I will make notes. Never thought about shutter speed so the first thing I will ask him is does the line go all the way across.I should have asked - is there something that controls the width of the line?FYI tek scope manuals :http://w140.com/tekwiki/wiki/Main_Pagethanks

author: AF6LJ
author_rank: Unknown
timestamp: July 14, 2016, 11:41:42 pm
content: That is a good site even if it is lacking the manual for the Tek 453 I am working on....Oh and Good Luck....

author: tautech
author_rank: Super Contributor
timestamp: July 14, 2016, 11:54:33 pm
content: Quote from: AF6LJ on July 14, 2016, 11:41:42 pmIs this what you need:http://elektrotanya.com/tektronix_453.pdf/download.html143.1 MB 238 PagesWait for "processing" to change to "get manual".

author: ez24
author_rank: Super Contributor
timestamp: July 15, 2016, 01:50:06 am
content: Quote from: AF6LJ on July 14, 2016, 10:07:31 pmThe CL ad expired (after about 2 weeks) Did you see it? It is located near Hamilton and El Cajon Blvd. Another picture showed about 1 inch of trace on the left side. So far the shutter theory seems the best to me.I wished I copied it the ad. If he calls me tomorrow I think I need to look at it.In mean time I will read these responses, some surprising answers.Do you want to work on another scope? If I get this, you can have an Hitachi V-1050 that has dirty switches, both hor and vert. i am going to hook it up tonight and test the shutter theory. I wished I had paid attention to the sweep speed.I also can throw in another scope, HP1200 that has a lose CRT (from shipping). It sits low and at an angle but seems to work. It just pisses me off.Don't you have a 465b or m? Do you want to sell it?

author: ez24
author_rank: Super Contributor
timestamp: July 15, 2016, 02:07:45 am
content: Quote from: AF6LJ on July 14, 2016, 11:41:42 pm?http://w140.com/mmm/tek-453.pdfEdit - sorry you probably want the service manual

author: AF6LJ
author_rank: Unknown
timestamp: July 15, 2016, 02:21:06 pm
content: Quote from: ez24 on July 15, 2016, 01:50:06 amBetween my own projects and two I am working for two different friends I am all used up..... Otherwise I would be happy to take a crack at it.As for the Tek-453 manual From the Tek Wiki site There is one manual that will get me by but it is not the right one.I currently have a Tek-466 storage scope and a working Tek-475, (and two parts mules). My plans are to keep them both....

author: AF6LJ
author_rank: Unknown
timestamp: July 15, 2016, 02:28:55 pm
content: Quote from: tautech on July 14, 2016, 11:54:33 pmThat manual is the same as one of the three from the Tek Wiki site.In this scope the fuses are inside not in the right hand side recess. there also are Channel one out, Gate A, B, and Sawtooth A out The calibrator is there and a switch to change its output voltage. There is also a sweep verner for for time base B.And..........It is the FET front end no Nuvisters.So it is a bit of a strange bird.When I get back on it I am going to see if anybody over at the Tek Scipes Yahoo group can give me a hand....Something really strange is going on with the power supplies....(all the low voltage supplies are high and cannot be adjusted...)...

author: ez24
author_rank: Super Contributor
timestamp: July 16, 2016, 09:14:21 pm
content: Quote from: klunkerbus on July 14, 2016, 10:03:17 pmThis was the problem. I got the scope and it is pristine, the seller says less than 10 hours on it and it shows. Like right out of the boxNow it is so clean I do not want to touch it

author: tautech
author_rank: Super Contributor
timestamp: July 16, 2016, 09:44:55 pm
content: Quote from: ez24 on July 16, 2016, 09:14:21 pmGood score, I hope it gives you good and long service.

author: tautech
author_rank: Super Contributor
timestamp: July 16, 2016, 09:49:38 pm
content: ez, you say in another thread you think you scored a current probe with this CRO, give us a model # please.

author: ez24
author_rank: Super Contributor
timestamp: July 16, 2016, 09:56:04 pm
content: Quote from: tautech on July 16, 2016, 09:49:38 pmI just posed a bunch of questions about it because I do not know what it is for, but I just started reading the manualP6021 with terminator(s) and no amp (if needed)

author: David Hess
author_rank: Super Contributor
timestamp: July 16, 2016, 10:18:51 pm
content: Quote from: alsetalokin4017 on July 14, 2016, 09:50:19 pmHow much for the wheelie on the far left, the one in red? Do you think it could carry a 545A?

author: tautech
author_rank: Super Contributor
timestamp: July 16, 2016, 11:03:14 pm
content: Quote from: ez24 on July 16, 2016, 09:14:21 pmHere's the service manual:http://elektrotanya.com/tektronix_465b_oscilloscope_full_sm.pdf/download.html47.3 MB 291 PagesWait for "processing" to change to "get manual".

author: ez24
author_rank: Super Contributor
timestamp: July 17, 2016, 12:10:02 am
content: Quote from: tautech on July 16, 2016, 11:03:14 pmThanks but it came with the service manual with fold out pages and a much smaller operating manual

author: AF6LJ
author_rank: Unknown
timestamp: July 17, 2016, 03:20:16 am
content: Quote from: ez24 on July 16, 2016, 09:14:21 pmWell low hours for sure but I doubt that low.When I worked at Loral the gear was almost spotless, and they wanted it kept that way.Nice score.

author: ez24
author_rank: Super Contributor
timestamp: July 17, 2016, 03:44:28 am
content: Seems the best thing is that it came with a current probe. I am getting messages from people wanting to buy it. The current probe is unused. I just don't know how to use it.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: July 17, 2016, 04:08:56 am
content: Quote from: ez24 on July 17, 2016, 03:44:28 amBy now you will have noticed that the current probe alone is probably worth more than you paid for the whole package. I'd say you got a real bargain.