Voltages will be higher, that is understood. But what does that mean to me as a guitarist? What differences will there be in application? Higher voltages mean more headroom, no? Lower voltage, quicker breakup, softer attack?
Sweeping generalizations about it will give you a wrong impression, because there's always exceptions or other factors that come into play.
All else being equal, if you have a triode with a 300v supply and another with a 90v supply, the higher voltage triode
should have greater output voltage (which you might interpret as headroom).
Problem is, if you bugger the biasing you can make the 300v triode distort before the 90v triode and have less output.
But what does that mean to me as a guitarist? What differences will there be in application?
By the time Fender got around to building the blackface amps, the wide variation in characteristics of different models in the Fender lineup generally evaporated. Fender evolved to essentially one amp circuit (except the Champ, VibroChamp, Princeton and to an extent the Bassman), with models differentiated by type/number of output tubes and size/number of speakers. That gives a consistent sound across the model lineup with the difference being power and whether the amp had Reverb/Tremolo.
As a rule, Fender designed the amp's supply voltages to take an input signal and deliver a signal big enough to drive the output tubes installed in the amp to make the power the catalog claims. You're probably not going to improve on Fender's design by much. Therefore, I'd say just build the thing the way Fender designed it.
If you want to tinker, then afterwards drop in the 1kΩ and 4.7kΩ resistors. The amp will still work, and will largely sound the same. If you have a preference for the altered values, keep em.
Topic: AB763 Dropping Resistors? (Read 4971 times)