George,
Don't know what you are looking to fix, but these radios are very straightforward to replace tubes and clean/tighten up the tuning cable, completion of which got my original Europa (the small one with chrome levers) working and sounding like "new". The tubes are available on the net, I replaced all of mine for about $75. I know ZERO about electronics, I won't even touch an outlet box in my home, but this was easy.
Best of luck,
Greg
'64 230sl, fully sorted out...ooops, spoke too soon