I've taken the last five days off work, so I've finally had some time to spend on some repair projects.
First up was the Tek 485 options 4/78 which was rather uneventful. The channel 2 first stage amplifier IC was dead, I replaced a few dipped tantalum caps, and on the +50V rail U2042 was dead. After those issues were resolved, I calibrated the scope.
Second up was the other 485. After some troubleshooting, I decided to sideline the project for now. Something is wrong with the CRT circuit and I don't feel like dealing with it just yet as I'd likely need to open the 485 I had just calibrated to do some comparisons.
Third project, which has been in pieces for almost a decade, is about to be posted in the "repair" section, but here's a teaser while I finish the first post:
Does anyone care to take a stab at what project #3 is?