Yeah cheers I noticed the absence of trimmers on Okko Diablo. Thanks for explaining!Actually, the topology is different. The Okko Diablo does not have trimmers because the drain voltage is set by the upper JFET. The trimmer setting in the M800 will have to be a compromise between 9V and 18V operation. Not necessarily a bad thing because you probably want it to sound different at 9V vs. 18V. Just trim by ear at both voltages. BTW, 1/2 Vcc is not a magic number, it's just a starting point in all of the JFET pedals.
Awesome, thanks for that!I just tried it on my Build & it sounds Huge @18v, I found it more controllable at 9v meaning at so called ''Bedroom'' levels!
My trimmers are all set at 4.5v @ 9v Power supply.
Yes it works but you need to tame that Volume knob @ 18v's !
I always use 35v or higher on my Builds.
People looking for that ''Marshall'' sound should seriously look at building this pedal
It has gone a little ''Under the Radar'' as it is built in Small Quantity's.
Purchase the PedalPCB Adaptor Board & save yourself some heartache with Fake J201's:
That is what I am hoping that a larger trimmer value is all that is needed.Hello.
I still never built none JFET emulator amp, but I guess I read about the Dr. Boogie that at higher voltage like 36v can help bigger trimmer value: 250k, 500k maybe?
For example how the 9 to 27 V switch is implemented on Duocast.