Hi All,
I'm working on a Zenith 4G21 stereo console amplifier/receiver from a 1962 Stereophonic. It has 2 6BQ5/EL84 output tubes. One preamp tube and a rectifier tube. It has a circular 3 holed (3 jacks) input that receives the input from the tube radio (that currently is not working). The tube radio receives input from the phono that is also not working (and passes it to the stereo reciever).
So this is the input plug (see picture). I just want to hook up any RCA source to it to see how it sounds. I have other record players and devices I can plug into it, but I don't really know what to do with this plug to continue testing this beast.
I tried searching other posts but I don't even know what this plug is, so with other posts I don't know if I'm on the right track.
Any advice for how to input sound into this plug?
Greatly appreciated
Sorry if this has been covered, but I want to be 100% sure before I solder anything else