Philco 3610 into Fender Champ guitar amp
After I listed and sold an "RCA 521" Champ I was asked if I can build the same amp in a given cabinet. Soon I got a Philco 3610 code 121 radio in my garage, the one made in Toronto in 1936! That was so far the oldest one I touched, with 6 pin tube sockets and massive steel chassis. We agreed with the owner that I create an electronic part of an amplifier and he would take cabinet and speaker portion. As usual, I didn't take a "before" picture, so posting the one from a Radiomuseum.org - great source of information, pictures, and schematic for many tube radios. I managed to clean the chassis and other metal components to the acceptable state. Original power transformer turned out to be good as well. With this I decided to keep as much of original radio as I could and build a Champ circuit around.