Peavey ValveKing 100 Overhaul

[physics]

Hey Physics

You said R4 in the tone stack but the schematic part you show does not have R4?? If it is like R113 and used to be a bigger value going smaller makes it suck mids - which sucks man!

I see lots of really tiny plate caps in high gain preamps. TUT says to make these small to have a tight low end, but how small can you go and not lose bass?

keep on rockin

Hi! The snippet I attached was to show the two attenuators I'm eyeing. R4 is elsewhere in the lead channel tone stack, what's shown is the clean tonestack. The pre-amp is stacked, with the lead channel adding two stages and a tonestack after the clean's two stages. I haven't checked all the plate caps yet, but the ones I have appear to roll-off below around 3Hz when combined with the next resistor to ground so I'm not too worried about those yet.