I had a Silvertone roundie that worked passably for three years after a couple of repairs (well, not actually correct repairs, but jury-rigs, like jumping the circuit breaker
and the push-pull AC switch on the volume control), but those fragile PC boards ... sheesh. One board in my set cracked, rendering the set unusable, when I tried to replace a bad tube; from then on I lost all respect for PC boards in tube-type TVs and even radios. Wouldn't touch one now with a ten-foot test probe.