my rule on thumb on lytics is over 100 volts and/or 20 years old, toss em. It's just not worth it. I need to check the main filters on them too. Those are expensive buggers but after it's done, you'll never have to worry again about loud bangy crapouts. The lower solid state voltage level units go bad too of course, but the tube voltage level units have a hell of a lot more stress on them.
I cant believe how many peoplez don't get that filter caps need to be changed on a 50 year old radio and discarded. Its like getting a 50 year old car out of a barn and expecting to be able to drive it around and have the brakes be good. Lots still think they only need to be changed when the radio is buzzing or humming.
the load all these transsexual sex change caps (now preoperative resistors)
puts on transformers is pretty great when you start multiplying the additional current drawn X number of bad actors.