S
Shadsunscrash
New member
I just tried the cap value changes (Bass cap from .1uf to 47nf/.047uf and Mid cap from 47nf/.047uf to 20 nf/.02uf). And i immediately noticed the bass response across its whole sweep is significantly better. But i did notice i wasnt as happy with the treble sweep or tone or the bright switch with the smaller mids cap (but i was just using two 47nf's in series at first so it was about .023uf and then i added a .1uf in series which came out to .19uf cause i dont have a 20nf rated for at least 400v on hand). And after trying those two mid values i decided to go back the the stock value of .047uf on the mids cap but i kept the new .047uf bass cap. I did it on a whim not expecting it to work out having a similar value bass and mids cap but it absolutely did. The tone stack seems balanced much better now. And it still sounds good/better when using the 6V6 also (i added a 6V6 to my build that can be selected via a switch on the front panel of the amp).
The reason i didnt change the "Turbo" cap is because i already removed that part of the circuit since i think its just a really bad feature to put alongside some of the other features of this circuit. I instead use the volume push pull to go from high input when pushed to a low input when pulled out and i really enjoy having the extra flexibility with higher output pickups and when using pedals (to do that mod you just add another 33k resistor to ground on the input which creates a voltage divider network and cuts your input signal roughly in half). I also added the NFB loop back into the circuit on a switch and when engaged it also helps tame the excessive signal. When its removed there is more high end and the amp is quicker to brake up which is exactly what we would expect it to do.
So again thanks for that info/recommendation. If anyone comes across this post whos building this amp or has already built it i highly recommend changing the bass cap to .047uf/47nf. It will significantly improve the bass sweep and help with the excessive signal causing and unpleasant distortion at higher volume levels.
The reason i didnt change the "Turbo" cap is because i already removed that part of the circuit since i think its just a really bad feature to put alongside some of the other features of this circuit. I instead use the volume push pull to go from high input when pushed to a low input when pulled out and i really enjoy having the extra flexibility with higher output pickups and when using pedals (to do that mod you just add another 33k resistor to ground on the input which creates a voltage divider network and cuts your input signal roughly in half). I also added the NFB loop back into the circuit on a switch and when engaged it also helps tame the excessive signal. When its removed there is more high end and the amp is quicker to brake up which is exactly what we would expect it to do.
So again thanks for that info/recommendation. If anyone comes across this post whos building this amp or has already built it i highly recommend changing the bass cap to .047uf/47nf. It will significantly improve the bass sweep and help with the excessive signal causing and unpleasant distortion at higher volume levels.
Last edited:
