There is some info about it in the TS-4353/U Distortion Test Set Op Manual... the plugins for the test set fit into a moded TM504A. The test set manual is on TekWiki -- Roy Thistle

Thanks George KD6NEW, I like the practicality of your adapter and using inexpensive 575 CTs! Is the 400V mod something you can add easily to a normal 575? -- John

In terms of current gear. The "modern" way of testing would be with 2+ SMU's depending on the number of dynamic voltages you want to sweep. You can get one up to 1Kv for the anode voltage but you

Noting all the ongoing comments on extenders, I do have 6 new factory parts, p/n 131-1078-00. These are the heavy green 56 gold contact double-sided PC mounting connectors, with slots for keying

Many thanks Guys for the informative advice. Particularly regarding considering other models in the 57* family. As emissionlabs says, the AVO VCM163 is highly thought of here in the UK. Never owned

Wow! Emissionslab, great page on the 576. Your repair notes will be super helpful. Great detail. Chuck, Love your tube tester solution. Very nice documentation. I’ve book marked both pages. For

I bought a couple of Dennis's VTCT boards when he first produced them. I built a couple of crude adapters to use on my 576 which worked pretty well but were cumbersome to use. I didn't like the use

Hi, Does anyone happen to have a manual to suit the TM504A? I just picked one of these up today, but I can't find much online. Thanks! Jared

Thanks Håkan! So that camera bezel was factory mounted. Mystery solved.

This is a well known and documented problem in the 22xx line. There is a string of 5 (or 6) 510K resistors that over time change value and produce the focus problem in some cases even going off the

Hello Dave, I have had some 50 different tube testers in my collection. People sometimes think a curve tracer is useful for tube testing, but a curve tracer is not a tube tester. When the tube is

No affiliation. https://boston.craigslist.org/nwb/ele/d/haverhill-tektronix-2465b-oscilloscope/7368845218.html Jay

Heh... Practically on top of me. That being the case, I hope you'll have time to swing by. Thanks. -- --- Bruce Lane, ARS KC7GR http://www.bluefeathertech.com kyrrin (at) bluefeathertech dot

Hi All, I'm running through calibration on a 2236. Everything's going great. But something I noticed is that the focus is at the extreme CCW end of the FOCUS knob/pot. I'm getting a fairly good

Hi Bruce. FYI, I am a bit NE of you, south of Renton.

It seems to be that the idea is to use the JAMMA female connector, and roll your own male connector.  If not, then get a PC board that is isolated, pin to pin for the number of connectors you need, a

I had used a Jamma extender as bought and didn't notice on the upper pins the A and B pins on a few were tied together. The plugin I was using with it was using those pins. If you buy one, look it

IIRC, the Molex Mini-Fit series worked OK, but the Micro-Fit did not. Could be the other way around. One series got intermixed with the AMP "equivalent" at a previous employer making industrial

I agree on molex quality.  Not good enough for what I do or want to do.  Stopped using them many years ago.  Don't remember the ones you were talking about, but a similar idea is had with flat flex

Mod BG description: // MOD BG includes modifying the 7104 by adding braces to the front-panel casting and strengthening the mounting of the crt bezel. // /Håkan