ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

previous: Josh Oops, I guess I didn't mention it, ... -- 8/26/2000 11:17 PM

Re: getting "sag" with resistors

8/30/2000 11:17 PM
Randy Jamz	Re: getting "sag" with resistors Start with 100-ohms @ 10 watts. Then run the amplifier into a dummy load and measure the voltage drop across the resistor and the current through it with a signal applied . You may get by with a lower power rating, but I doubt it. These values work for me. P.S. Be sure to put the resistor in series with the rectifier and the first filter capacitor. You could also use lower value capacitors in the power supply to soften things up. If you have 40uF or higher, try 20uF.

8/30/2000 11:17 PM

Randy Jamz

Re: getting "sag" with resistors

Start with 100-ohms @ 10 watts. Then run the amplifier into a dummy load and measure the voltage drop across the resistor and the current through it with a signal applied . You may get by with a lower power rating, but I doubt it. These values work for me.
P.S. Be sure to put the resistor in series with the rectifier and the first filter capacitor. You could also use lower value capacitors in the power supply to soften things up. If you have 40uF or higher, try 20uF.