New Ways to Diagnose Electronic Troubles by Jack Darr 1968 Hardcover TAB Books
What makes this 1st Edition cool is its place in the textbook's evolution.
Electric Guitar Amplifier Handbook 4th Edition Jack Darr Amp Repair Service
Electric Guitar Amplifier Handbook by Jack Darr. Fourth Edition / Second Printing (2006). Classic reference book covering electric guitar amplifier design, servicing, troubleshooting, circuitry, power supplies, signal circuits, transistors, tube amplifiers, repair procedures, schematics, and electronics concepts related to guitar amplifiers.