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Re: Output tube Grid Resistors

9/14/2000 1:44 AM
Peter S	Re: Output tube Grid Resistors I've found alot of different values of these resistors that work best in different amps I've designed and built. I have always used the 220k resistors on EL34 Marshall/Bassman style amps. Recently I was reading something someone wrote about getting better tone out of Plexi's and Bassmans using 100k resistors in this position. I also read something Ken Fisher wrote years ago about using 100k resistors extending tube life, but not changing the tone. I know what it does to the tone of the Kimerik K-50 amps, but I was just wondering if anyone had any input on whether they thought 100K resistors sound better, worse, the same? It does give the output signals going to the output tubes a little better balance, which may or may not be a good thing. Peter S

9/14/2000 1:44 AM

Peter S

Re: Output tube Grid Resistors

I've found alot of different values of these resistors that work best in different amps I've designed and built. I have always used the 220k resistors on EL34 Marshall/Bassman style amps. Recently I was reading something someone wrote about getting better tone out of Plexi's and Bassmans using 100k resistors in this position. I also read something Ken Fisher wrote years ago about using 100k resistors extending tube life, but not changing the tone. I know what it does to the tone of the Kimerik K-50 amps, but I was just wondering if anyone had any input on whether they thought 100K resistors sound better, worse, the same? It does give the output signals going to the output tubes a little better balance, which may or may not be a good thing.

Peter S

Replies:

Frank Clarke Time constant of the AC coupling to... -- 9/14/2000 3:13 AM