This has been sitting in my project (s) pile for a while. I pulled an amp chassis out of an old (I'm guessing late '50s-early '60s phonograph record player with the thoughts of making a little combo amp someday. It has a 5Y3 rectifier, two el84 output tubes, two 12AX7s, a6AN8 and a 6AV6. It looks like the 12AX7s are the main pre-amp stage for the phono inputs, and a mic input going through the 6AV6, and the 6AN8 appears to handle the phase-inversion to the output stage. There are 4, and 8, ohm taps on the output transformer. There is a schematic, but it's on buff colored paper. I'll try to scan it and post a picture later. My question is, would this work for a guitar amp, and has anyone had experience doing this, and how did it work out?