Heathkit SB-220 Repairs

 This Heathkit amp had a few problems... it was running very hot at idle, it stopped passing RF on TX, and had a soft key that was getting rf into it and causing erratic operation. Here's what I found...

Screwdriver tip pointing at unsoldered bypass cap in soft key, that's where RF was sneaking in :-)

A resistor from the negative dc bias circuit was incorrectly wired, so the tubes were "idling" at about 150-200 ma...

Coax center conductor had broken loose from the t/r relay...