A very cool book from England on tube amplifiers. Covers theory, and concentrates on amplifier quality - distortion, noise, etc. and how to prevent them. Practical, not too theoretical. Covers amplifier circuits as well as tone controls, mic and pickup preamps, and power supplies. Also includes schematics and parts list for the ½Garner Amplifier½, an amplifier, as well as a preamp and a couple of tuner circuits.