I've got this old radio that takes two RCA inputs, but I'm trying to just mount a 3 pin female 1/4" jack to it so I can more easily plug in. The radio only has one speaker and the 1/4" jack that I have has tip, ring and ground. I have no idea which one is hot and which is cold, but I don't think it matters. I don't see a ground, so I'm just going to lift it I guess.
I found a site that I thought explains what I'm trying to do but I think mine is a different situation. This site says to jump the cold to the ground. How to Wire an XLR to a 1/4" Jack
When I do that, I only get the right side.
Is there a way to take a stereo 1/4" plug and sum it to mono?