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Vintage threads from the first ten years

previous: GarryZ I ourchased a matched pair of Svetl... -- 9/17/1998 9:43 AM

Re: Tubes, Biasing, and Fender Hot Rod Deluxe

9/18/1998 8:20 PM
Harvey	Re: Tubes, Biasing, and Fender Hot Rod Deluxe Garry, at my web site is a whole discussion on the concept of tube bias. In general, I have found that to prolong tube life, and to prevent or at least minimize cathode bias resistor blow up(due to tube thermal runaway), I bias lower(less current = more negative bias voltage). This seems to work, and still keep the amp in class A or close to it. In any event it does not seem to affect the sound much, and definitely gives the tubes and amp less stress. My web site is http://www.angelfire.com/on/vacuumtubes.

9/18/1998 8:20 PM

Harvey

Re: Tubes, Biasing, and Fender Hot Rod Deluxe

Garry, at my web site is a whole discussion on the concept of tube bias. In general, I have found that to prolong tube life, and to prevent or at least minimize cathode bias resistor blow up(due to tube thermal runaway), I bias lower(less current = more negative bias voltage). This seems to work, and still keep the amp in class A or close to it. In any event it does not seem to affect the sound much, and definitely gives the tubes and amp less stress. My web site is http://www.angelfire.com/on/vacuumtubes.