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In Reply to: RE: Resistor dissipation Question posted by timp on September 16, 2012 at 13:51:45
You might consider using a 5R4 to drop more voltage in the rectifier. Also lowering the input capacitor value bfore the 6H choke will make a difference. Try 4.7 to 10 uF with a motor run cap. One other idea is to use a CL-150 inrush limiter on each leg of the transformer, as this will also drop a few volts.
Follow Ups:
Jeff,
Nice post. I agree with much of what you said. However, the large voltage drop in a lovely sounding ( directly heated !!) 5R4 comes with a price to pay, higher Z.
A single 5R4 is best used in a preamp. Too whimpy for a stereo P-P amp seeking to play back dynamic expressions.
Jeff
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