Pre-Amplifier project book using commonly available tubes and easily constructed. Designs often feature 0 feedback topologies (some local feedback is used)and tightly regulated supplies. A variety of line stages and phono stages of varying complexity are featured. The more advanced line stages feature front panel switchable output polarity. (Absolute polarity) Phono stages are all passively RIAA equalized with single stage passive equalization networks.

Pre-Amplifier project book using commonly available tubes and easily constructed. Designs often feature 0 feedback topologies (some local feedback is used)and tightly regulated supplies. A variety of line stages and phono stages of varying complexity are featured. The more advanced line stages feature front panel switchable output polarity. (Absolute polarity) Phono stages are all passively RIAA equalized with single stage passive equalization networks.