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Re: Sweetest Whispers Questions

In the FPIII, with the volume turned all the way up, (full clockwise) the incoming audio signal passes through only the series (typically 33K) resistor, and the 15K resistance serves as the grid-to-ground resistor. The input resistance varies from 48K at CW poassition (full volume) to 33K at at the fully CCW position, if the series resistor is 33K.

At lower levels, the incoming signal passes through the 33K resistor and then any of the ten resistors which are "upstream" from the "wiper" switch contact.

At line level signal voltages, any noise that may be generated by the resistors is minimal.

/ed B in NH


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