Mesa Boogie Dual Caliber DC3 Tube Amplifier Circuit Diagram  Contains electronic diagram and parts values. Good tool for troubleshooting and repair This diagram has the following sections: Block diagram Power supplies Preamp, section 1 and 2 Power amp Switching Diagram is in form of electronic file, PDF format, black and white, 7 pages, size - 205 Kb Upon purchase, please provide me with your email address which you would like to use to receive the diagram You than can download this file and view and print it on your computer *****************