Bottlehead Forum

FP III Gain

71.80.65.127

In Reply to: RE: goldpoint attennuators in a foreplayIII posted by Mark in Wisconsin on March 04, 2008 at 16:12:36

Reread your post, and the quick answer is yes! More below.
The gain of the Foreplay III is fixed, but the volume control passes on a variable voltage to the Voltage Amplifier stage. The 33k and 15k (series dropping resistor and SW) of the stock FP III form a 2 to 1 voltage divider. That is, the volume control has only 1/3 of the incoming voltage on it.
If you change the volume control's resistance, you have to change the series dropping resistor's resistance.
What you are controlling is the size of the signal that gets the FP III's gain applied to it.
It kind of works the same way, but this gets us all singing from the same book.

"Remember, YOU are the only one who needs to be happy with the sound of YOUR SYSTEM."
Grainger Morrison
There Is Only One (Grainger Morrison, it seems)

Edits: 03/04/08

Follow Ups:

RE: FP III Gain - howardnair 17:51:18 03/04/08 (2)
- RE: FP III Gain - Grainger49 05:53:19 03/05/08 (0)
- RE: FP III Gain - Gaspode 05:26:33 03/05/08 (0)

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