John, I have posted a photograph of a few R7103s in a rack and ready for an underground test. You will see the same hardware on the bezel. The photo album is named Mighty

Mark, Wow, that is a tight call from such a dark picture. I had a look at the TekWiki page, and while you are obviously right, I would have had a very hard time figuring that out. I'm not at all

Its great to read about other folk's projects. Certainly those relating to valve/tube testing. It also enhances my belief that hybridisation of vintage T/Eq with other vintage items &/or modern

Jeff, Even with the dark photo in the ad, it is a 565 with P2 phosphor. The placement of the knobs below the screen and what writing that can be read were compared to the light pictures of a 565

The following files have been uploaded to the Files area of the TekScopes@groups.io group. /TM5xxx Pass Transistor List New.pdf By: Jared Cabot

Martin, I read your posts about using the Metrix with a 576, got me thinking about trying the same thing with my New London 901A Transconductance Analyzer. Seems to be similar to your Metrix, all

Clever idea! I wonder: how about a dropping resistor in series with the tripler input? If deflection factor stays constant as you vary intensity, you don’t have to de-wind. I salvaged a handful

I saw your post on Facebook; great job. Question: Are 535 transformers easy to get? I would imagine the 535 still around have been fixed up and restored. The 547 is a better scope than a 535, so to

Some folk might ask why a "Standardised Valve/Tube requires "pure" DC applied to all electrodes for the standardising process. Answer - because the manufacturers have always tested their valves with

Hi Jac, what is so special about Gm measurement? The U61 has Gm-values for each tube in his measurement booklet. You then need to vary the emission-setting of G1 plus-and-minus 0,5V and get Gm by

Some tube testers work so crazy, you can only calibrate them with a tube of known data. This was called a standardized valve by the AVO company. It can be any tube, and does not have to be a Bogey

snapdiode, after reading through the wiki page on Delrin I doubt that the solvent I have will work, but I'd still like to give it a try, in case the plastic is something other the POM. I'm wondering

Hello Morris, Rick here … Is Deon back from Japan? Also, when lockdown is over, I would like to come for a visit and pick up that carcass ;-) Cheers.

A friend of mine named Deon Vandenberg recently acquired a 547 scope and as expected, the HV transformer had the classic thermal runaway problem. The only cure for this is to replace or rewind the

No connection with the seller, but I found this while trolling for anything that mentioned “tektronix” and thought others might be interested:

have a chance to pick up a Tek 524AD What would be a fair price for one of these in fair shape (need re-capping) with, cart, manuals, a few probes and a 'supposedly' an extra set of tubes?

I'll read into the photos some more next. Looks like I'm caught not reading into and/or critical thinking just yet. Figured I'd post this related link too since might provide some insight with

Does anyone have a cover for a TM-515 power module they would part with?  I just got one of them, it is dirty and probably needs all of the condensers  changed out, but is otherwise in good

To remain on topic, I should mention Tektronix oscilloscope at least once. Not all of the underground testing was for intrinsically destructive weapons. During the mid and late 1980s, many of the

Hello group, I'm looking for the following for these meters: - EEPROM dumps. - A copy of WSTRM software. (WaveStar for Meters) - Known commands or clues on another Tek multimeter that uses the same