This voltage across R3 while this circuit is idling ... we had the best audio gear in town: Schematic of battery operated tube preamp. In this design, two pre-amplifiers described above are ...

The folks at [ElectroSmash] recently released 1Wamp – a one watt, open hardware, Guitar amplifier packed with features. It consists of a JFET based pre ... circuit analysis of every part of the ...

Technology journalist specializing in audio ... amplifiers ever made—the 33/303 two-box pre/power amp system from Quad—is back. The British high-end hi-fi brand is reviving the design 57 ...