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Hi, I tried to use a 7000 vertical amp (a 7A19). In the 11302 it works perfectly, in the 11403, I could not make it run, because I could not enable the trace, not having the plug-in button. Today I

Renaud, The 50V supply should be within ,25V, 49,75 to 50,25V. The 475A schematic has more voltages listed at points in the power supply. Pins 2 and 3 of the IC should be 9V. Pin 1 should be 10,4V.

Definitely fascinating, Ed! It would be great to see some picture of the process, should you have some; or, at least, the final product. If not, most of us would have to use our own imagination, which

A quick go - NO go testing of the high voltage sections would be to run the back of your hand near front of the tube. Of the hairs on the back of your hand stand up due to the static then you can

I recently purchased a 7A18 with Option 6. For cleaning purposes, I removed the knobs and faceplate. When I removed the VOLTS/DIV knobs, each had a washer against the frame with a spring which

Having spent some time trying to fix a 2756P analyzer, I can contribute to the group some of my findings. The analyzer had so many problems that I was close to giving up. In many cases,

Hello David, thank you for your response. I did all the tests that Mark advised me below but without success. I think that the problem is with the HV module. Unfortunately, I do not have the equipment

Hello Marc, Thank you very much for your response. I tested all the Zener diodes and transistors following the schematic but so far I have not found any faults. What is the max/min voltage accepted

Fascinating story Ed. It sounds like your hard work paid off. I did this kind of swap once with a 502, but it was very simple compared to yours. I basically just removed the front panel, turned the

Martin thank you. You reminded me of modifying 7000 series plugins to use in the 602. All that was required was to grind off the lug on the connector that positioned them in a 7000 series scope. Ver

Totally agree. I have two DSA602s, unfortunately not the "A" version with the floppy, but thanks to digital photography thats not as bad. Memory depth could be better, but the windowing capabilites

Thank you for your comments. The 502 Frankenscope. Is a hybrid. It was made from a 502. The three plugins are from a 561A. The connect directly to the two beams of the 502. Unfortunately it was never

I have success finally on the conversion. I did start with trying to make another 7603 from the salvaged parts, but too many things were wrong with various items, so I decided to try the R7613 to 7613

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