I've recently acquired an APS-25 tube amplifier from a working Gulbransen organ. I am wanting to convert it to a guitar amplifier. I managed a partial schematic, and have lots of pictures but seem to be able to find very little information about it. It runs a 6CA4 rectifier, a 12AX7 preamplifier, and 2) EL84's for output. The amplifier is in really clean condition and was working (making sound), I made sure I kept all of the wiring connections. I know there are 2 power leads that run from the chassis the plug one is to power the motor for the Leslie speaker, and the other was for an ad-on rhythm generator. I'm sure both of these can be removed. I'm thinking speakers wired to speaker leads and input applied at input jack and I should have sound. Here are some pics of the amp I removed the tubes while I'm playing around with it. As soon as I can figure out how to attach photos I will, this is my first post and I am new to the site. I am also knowledgable but new to tube amps. Any warnings, tips, specs, or other information would be greatly appreciated.