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use the pentode and the triode for the two gain stages, the pentode will sound heavy, since the pentode has a far higher mu (gain) factor than the triodes in this schematic
hey,another way for a gain POT is connecting pin 3 to the tube's pin 9, POT pin 1 to ground and a 100uf cap between POT pins 1 and 2 (see image, srry for the use of MS Paint), this works verry good for me, u used it in a transistor/tube hybrid pedal, but i used a trim pot, and another pot for changeable gain
yes, by turning the gain kob to a lower resistence, the gain gets higer, keep this in mind while making the pedal so you don't have reverse knobs, i've had that a few times and it sucks
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