u/No_Group_725

On a 12AV6 tube. The lug is WITH a plastic key I think and is being used seemingly to bridge the couplate from lead 2 on the couplate to the right terminal on the volume control. Almost certain every component in this 1965 Zenith 5M04 radio is untouched. No mention of it existing in the schematic.

Zenith Chassis 5M04 A wire is connected from pin 2 on my 12BA6 IF Amp tube to a speaker terminal directly? Bought untested at antique store.

I have not added anything and just curious if i should test them or leave them or if anything else should be done or inspected.

Inside a 1950s-60s Zenith H723 AM/FM tube radio. Next to the rectifier.