Williamson Valve Amplifier
The Williamson amplifier used four 6J5/L63 valves and two KT66 valves. This article also shows the construction of the power supply unit.
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Williamson Valve AmplifierIntroduction
Circuit Diagram
Design Notes
Wiring Diagram
Tag Board Layout
Power Pack Circuit Diagram
Power Pack Wiring
Circuit Details and Performance
Parts and Price List