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Guitar Amplifier PSU

Tubes (thermionic valves) have never departed from the amplified instrument scene and the majority of guitarists, including very young ones, wouldn't use anything else. Some diehards think that the H.T. (high tension) rectifier should also be a piece of glassware and some manufacturers are still producing amplifiers incorporating one. The circuit shown here is a compromise typically intended for the amplifier preamp and phase splitter stages.
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