I had to change 100% of the micas from a BC-669D. Also, micas in some
ART-13s have also gone bad, some near impossible to get to. I don't
think many of these components were ever even dreamed of to go this
long! On the other hand, my SX-28, apparently in use almost
continuously since is was purchased, is still humming (no pun
intended!!). Hope I can get away with not doing the RF section...?
Worst B/Bs I ever saw were in a National NC-125. They looked like they
just dropped out of a bag of spoiled mussels.