That's proper tech!
I'm still working on 'old' but 'not that old' Tektronix scopes for fun.
I've just got a TDS3014B back up and running - this one had a failed power supply, and failing memory (battery backed up SRAM which has past it's use by date).
These scopes can be hacked to 500Mhz bandwidth - this one is showing a sub 700ps rise time on a 10Mhz fast edged pulse generator, so hack successful.
The power supplies for these are a bit weird, they are always on, with the power button enabling the output voltage to make it to the power distribution board. This is because there was an optional battery pack, so the scope would charge the battery even when off, but the downside is that the not hugely efficient power supply is generating heat which knackers the plastics in the case, and damages the capacitors.
The power supply had blown everything on the feedback side, the isolator had stopped isolating, so large voltages reached bits they shouldn't, so it was a complete mess.
The battery backed up SRAM are unobtainable, so it's a case of fashioning a replacement from components which can be found. These DS1742W memory were easy enough to replace once i'd made the mis-play of ordering 5v memory rather than the 3.3v required...
Behind the scope is a new to me microscope for soldering work which has really helped as i've found myself struggling with small SMD components in the more recent things i've been working on, and behind that, more victims.
I've currently got a TDS210 that fails to start, another TDS3014B which had a short on its processor board, and a TDS644A which has triggering problems on its acquisition board.