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Perhaps this may help someone in the future. I was contacted by a woman in Delaware whose father was a collector. I was given a lot of 8 scopes. Nothing incredible, mostly 4xx series. There was a 485 and a cart and that's what I'm opting to keep. One I hadn't seen before was a 488, which from what I've read is a slightly modified US Military 2235.

Very serviceable! The front panel is a bit of a PITA but the supply is very accessible. I replaced a good portion of the electrolytics. The bulk filter and Sangamos read extremely well so I left them in.

But I still got burned. And so did the scope. A word of caution for anyone who comes across this series. Under the PSU cage, beneath the IEC line filter and behind the power button is a single RIFA 68nF filter cap. I missed it. But after the recap, I let it burn in. When I heard the pop and the current limit light up, I expected a tantalum. But after 30 minutes of searching, I can say it was pretty obvious once I found it.

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