This is a Rauland model 1814 tube type power amplifier with microphone mixer. I cleaned and tested it and it works great.

The 3rd input says "phono" but it does not work as a turntable pre amp it is -10 line level in so you can hook an ipod or CD

player to it and mix between that and two microphones. It is clean sounding with no hum and uses two 6V6 tubes.

Some one put different input connectors on the back and a screw terminal for the output.

It comes with the schematic on the inside of the bottom cover.