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previous: Reverb Fellow Ampagers,I a... -- 8/27/2000 2:38 AM

Re: Higher Screen Resistor Values - Tried It?

8/27/2000 5:38 AM
Peter S	Re: Higher Screen Resistor Values - Tried It? Reverb, I have done fairly extensive testing with regards to the effect of different screen voltages/resistor values etc. while I was developing the early Kimerik K-50 amps. With lower screen voltages/higher resistor values you will have to set your control grid voltage less negative to draw a given amout of current at a given plate voltage. The amp loses headroom with the lower screen voltage, but the effect on tone is very subtle. With 6L6GC tubes, the screen grid voltage difference between a 470ohm resistor and a 1k-1.5k is very minimal because 6L6GCs don't draw very much screen current. The effect on tone with a 1k resistor on a Fender style amp is IMHO hardly noticable, if even audible at all. Peter S

8/27/2000 5:38 AM

Peter S

Re: Higher Screen Resistor Values - Tried It?

Reverb,
I have done fairly extensive testing with regards to the effect of different screen voltages/resistor values etc. while I was developing the early Kimerik K-50 amps. With lower screen voltages/higher resistor values you will have to set your control grid voltage less negative to draw a given amout of current at a given plate voltage. The amp loses headroom with the lower screen voltage, but the effect on tone is very subtle. With 6L6GC tubes, the screen grid voltage difference between a 470ohm resistor and a 1k-1.5k is very minimal because 6L6GCs don't draw very much screen current. The effect on tone with a 1k resistor on a Fender style amp is IMHO hardly noticable, if even audible at all.

Peter S

Replies:

Steve A. Peter: &... -- 8/27/2000 6:02 AM
Reverb Peter,Thanks for yo... -- 8/28/2000 3:05 AM