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Two input long tail pair phase inverter and bias wiggle tremolo produced from '61 to '63

Schematic

Very early sixties iteration of the two input US amps sees much less channel volume control interaction with them separated by the 220k mixing resistors. A long tail pair phase invertor drives a pair of 6V6GT power pentodes whose bias voltage is wiggled by the tremolo control.

Click to enlarge
£29.00

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