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Tried to work on the tonestack, best result by using 100k pot for treble. No differences with the 470n in series at r19, HUGE DIFFERENCES bypassing the 1uF cap just at the output (not present in the pedalpcb circuit), it opens alot the sound by rising the mid-high freq. Bypassing it make all...

What's general rule about this cap? Higher values will raise bass or is the opposite? I would like to get more scooped mids...

That's interesting...What about removing the 1uF electrolytics?

470 in series with 1 uF...In this way the only differences between pedalpcb circuit and pcbmania will be the 1uF

mmmmmh, so you not readjust bias at 18V? All JFET values will be out...Without rebiasing I measure some 15-16V !

Hi I've found the 800 great at 18V. What about bias JFET? I've used the "half voltage rule" but I found more open if on Q1, Q2 and Q3 I set with higher drain voltages (I can't hear many differences by biasing Q5 and Q6). The only problem is a low end loss... I'm working around 10V for Q1, 14V...

Ok, tried all, bet result is to bypass R19 (equivalent to use trimpot to maximum), my question is what about to add the 470n in series to the bridged r19 (like the m800)? Remember I still have an electrolytics 1uF just after (really strange).

What do you think about replacing the 10n cap (c13) with 22n? I also see r13 (10K) in the pedalpal is 4k7 (r12), do you think it can affect the sound)

Thanks, I'll try to bypass R16 for see what happen

I've build an identical pedal using the pcbmania circuit, but I can't understand why in the output section there are some differencies between the circuit posted here and the one I followed, in red the differencies... Anyone has an idea of what can those components influence the sound?