Tube Amps / Music Electronics
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|previous: Ben Well, If I am going to use this bia... -- 3/1/2004 3:30 PM||View Thread|
|3/2/2004 12:58 PM|
|Dave H||Re: OK how do I calculate the values for it?|
If itís like the 6G3 Brown Deluxe schematic on the Fender Field Guide i.e. 100k + diode in series from one end of the B+ winding going to a 22k with a parallel cap to ground the bias voltage will be half the average value of the transformer voltage x the resistor ratio.
333/2/1.11*22/(100+22) = 27V
The 333V on the schematic will be rms. 1.11 is the rms/average ratio for a sine wave.
|Ben That's exactly what I needed to kno... -- 3/3/2004 1:49 AM|