Fun weekend project. The tube compliment were identical to a Fender Champ. (12AX7, 6V6, 5Y3) Customer wanted this amp for electric guitar use. I pretty much converted it to the Champ circuit, except for the potentiometers and tone high cut. Power and output transformer are stock. I added 1/4" input and speaker output jacks. A fun little chassis to work on. Really came together well. These little PA amps are a good building block to create your custom tube practice amp! If you want to see more of my work, see: Plus see: d-labelectronics.com I make a line of Class A and AB driver boards to make your first amp project easy. Now as you can see, I need to generate funds to feed these cats!