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AFAIK, the 'aging' was significantly about... but not only about, stabilizing the emissivity of the cathode. Again... AFAIK... despite decades of research ... the exact mechanics of thermionic

I read Roy's posts on this tread and I did not find them offensive or aggressive. However, I do believe that the recapping discussion points have been sufficiently covered so there is no need to

Posts to this topic are now on moderation.

Roy, I've had a few complaints about your posts on this thread. If I receive more, I will need to consider banning you from the group, which I'd prefer not to do. David (Moderator).

Me too ?

Roy Your tone is highly aggressive, and I think you're just looking for a fight, for some reason which it's above my pay grade to understand. I'll debate you anytime on technical accuracy, but I

Thanks for this collection, just like a trip down memory lane. Nice to see all the Ampex manuals being saved, I kept hoping to see an ACR-25 collection. So many shops had a bookcase full of the same

Roy What's your point? Menahem

Hello, I have scanned some Tektronix Television Products related material, including: Tektronix TSG7 Instruction Manual Tektronix SPG1 SPG2 Instruction Manual (has information regarding the SPG2A

Some more trouble. Blank screen. Still boots because I have the 1kHz on the probe comp signal and when put on CH1 it goes from "ready" to "trig'd" from the trigger "main level" pot. I'll measure the

Actually, I spoke (or asked) a little too soon. I was browsing an area of my basement behind the cobwebs and discovered I had this metered variac laying around. I'm assuming this will do the trick.

Roy, Generally, it's best to troubleshoot a problem and solve it. BUT, in THIS case, what we have here, thanks to all the efforts of these capable and experienced techs here, is that ALL the problems

Ironic that the tek logo looks a bit coarsely digitised for an analog scope

The aging process for 157-0125-00 is documented on page 36 of the tube aging pdf on tekwiki. https://w140.com/tekwiki/images/3/3d/Tek_raw_tube_and_aging_specs.pdf It’s also mentioned on page 110

It's great you've submitted this information here. I'm sure this will help some folks down the line. Way to go. <rich.meyer@...> wrote:

The Tektronix 155-0124-00 is a hard part to find. I was able to repair my 2235 scope with an alternate part. I used a Tektronix 234-1008-20 which was made by Maxim for Tektronix. The Military

Jim, I had gotten some of those very tubes in the 1990s. I didn't use them until I (tried) to calibrate my 547 a few years ago and found them a little less than wonderful than actual 6DJ8s to the

All gone, looks like I missed out again.

I recently bought a 3B3 via ebay, that I got cheap because it had been damaged. The only obvious damage was that one of the long, round, chrome plated chassis rods was badly bent. I thought I had some

Hi, Sorry for this old story but there's some news about my TDS520. Due to real life it waited since december 2023 for my attention. Last week only took it from its shelf, opened it and I removed the