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I have over the years had a couple of DS602’s. I found them wonderful scopes to use and play with. They can do so many different things than an analog scope. The user interface was extremely easy.

Thanks for the suggestions. I am a bit aware of aging plastics exuding their plasticizers, shrinking and stiffening up. Armor All does work, especially at warmer temperatures, but I have had a few

You may want to first try some kind of solution of polyvinyl alcohol to make the material more supple. That should be low-risk and you can probably wash it off if it doesn't help. Next up maybe

Great collection! Tell us more about the "502" frankenscope. Very interesting piece.

Hi folks, I'm new here. The NVRAM (Dallas DS1245YP) inside my TDS7104 just died and I found that someone had created an FRAM replacement for

Has anyone had good results with any sort of treatment for old Tektronix covers? I have them for some of my "5" series scopes, but they have shrank and won't go on the scope without serious risk of

That is a fine collection. I recognize, have worked on, or have many of them. The customized cases on some of them are quite interesting too. I have seen some pretty good customizing at TV stations

John Williams <books4you4@...> added the photo album Reviving interest in 500 Series Oscilloscopes ( /g/TekScopes/album?id=299466 ) : I am posting some photos of my Tektronix

Looking for schematics and manual for a United Systems Corp. Digitec Model 311 DC Calibrator. Any help greatly appreciated. Rick

I now have full-screen deflection and am very relieved that all my mixers seem to be intact. Culprit was a bad capacitor. For posterity, in case this helps someone else down the road... I was about

I have DSA602A scopes at home and enjoy using them. The flexibility of various channel voltage and frequency options is very useful along with their waveform definition entry, averaging/persistence

It is probably the same user on tekwiki (Kurt, "..one of the maintainers of Tekwiki..") and ebay (lilwing3). Ebay ad (27-Aug-24 12:41:00 UTC) and Wiki picture upload (15:41, 27 August 2024) was made

Mark, You are correct about the parts and board number. Also R2326 and R2336. On the A21 and A22 boards, the 9100 ohm 1/4W and 20k pot are known to go bad due to being run beyond the rating of the

Mark, Thanks for the tip, but I am unsure where the d-c restorer diodes are, but I think you mean CR2352-55 and CR2342-45 and R2356 and R2346, all on the HV board A24? ?? Mark

Mark, A correction. There are (4) 22meg resistors in each scope, not 8. Mark

Mark The d-c restorer diodes are bad, replace all of them with 1N4937. Also replace the 22meg 1/4W carbons with Vishay VR37 series, 594-5053DM22M00F. Get 10 of these to replace the 8 in the supply or

I have been working on a 7844 dual beam scope that has a beam intensity problem. The scope was working, then the power supply quit with a rapid tick. Ok I had another 7844 that has a different problem

Hi, TR502 is rather expensive even as an used instrument. There is one TR503 on eBay. (I know it is not the same thing). Too expensive for my

I tried to contact the seller about this but eBay won't allow URLs to be included in the message. Barry - N4BUQ

I thought TekWiki's images were those that were uploaded intentionally by someone who owns/owned the items. Maybe not. Barry - N4BUQ