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Folks, The Tektronix 108 manual is here: http://w140.com/tekwiki/wiki/108 Here is a list of manuals that are needed, but not available: http://w140.com/tekwiki/wiki/List_of_manuals_that_are_needed If

Found a problem area in the vertical output board. 18v and 48v on outputs to the plates and no signal on them. The signal exists on both inputs to u470 and is within spec. Disconnecting the plate

I saw your 2220 question the first time you posted it a few days ago, and I did not have a nice short answer for you. Since you have not gotten the answer you were looking for, let me comment a bit on

Hello, I went to lemo.com and selected the nearest office contact details and sent them an email inquiry. I am shamed to admit that "right now on my desk" actually means they have been buried under

Hi to All, Tek used the 8393 Nuvistors in the Type 1A6 and 1A7. Look at the Circuit Description of both Plug-Ins and you know why. The so called differential adjustment of heater voltages. In addition

Probably meaning it's only there at the fast ranges, 500 ns and 50 ns? The Rate meter can cope with an enormous range of repetition rates, split in 3 parts IIRC (more or less logarithmic). Because of

Hi Patrick, I have some good news: my SG503 is fixed and running. With your and David's help, I identified Q180 (2N3906) as having failed . C180 was also damaged (open). R180 and R216 had signs of

Is this the kind of application where the differences between saturating (TTL) and non-saturating (ECL) logic would apply? I wonder if the extra jitter is from poor power supply rejection.

I recall the behavior's independent of rep rate (at least between 1 kHz or so and 1 MHz). I initially saw it with my homebrew avalanchers, but it also was apparent with 067-0681-01 (driven at whatever

r. Unfortunately Q203 is one of the more tedious-to-replace transistors in the HP130C, so at present it's put-off-today-what-you-can-do-later :), with the added excuse: experimentally lets see how

Hi Mike, Strange things in the dot pattern happen indeed in Random mode, but I don't remember a case of time-reversal. I think much depends on the repetition rate of your signal generator. I think the

Q203 may have developed more leakage over the years and will eventually have to be replaced. I'd look for a replacment just to be ready for when it does. Arden

Hi David, It's not an elongated dot. It's simply a small segment of the sine waveform. If you scroll through the scan positions, you will see that "dot" follows the shape of the sine wave. Therefore

I have seen them used though where profile was not a consideration. Tektronix of course early on had their own version with those low profile Teflon(?) insulated collets before they switched to

Hi Allow me to offer a different opinion on this isolation matter. I worked on a 7D13 with an isolated(floating) section this weeikend. I used my isolation gear so that I could tie my scope

Hi! Thanks much for the information! It's in the archive now, so the next to search on this will find it. Would you care to share the distributor you used, and I'm almost afraid to ask, the price?

At least check the incircuit power supply electrolytic capacitors for ESR. If you don't have an ESR tester, buy one or build one. There is lots of ESR information on the web and also in the archives

Hello Magnus. I do have a piece of equipment like that , this is what it looks like http://www.tiptemp.com/products/1359/variac Can you please explain some more. How can I find out if it is isolating,

Don Lewis wrote Fri, 20 Jan 2012 04:36:14 -0800 : " My old HP-130C scope has two 7586 Nuvistors in it, btw. " A really fine rig. I read somewhere the HP-130C is regarded by some as the last good

Hi Albert, Pointing me to triggering was an excellent judgement call. I fiddled a bit with the bias controls on the various TDs and managed to get a stable display at some trigger levels, but it was