Re: Nocturne Junior Backyard Preamp

Posted by fx-fidden on
URL: http://guitar-fx-layouts.238.s1.nabble.com/Nocturne-Junior-Barnyard-Preamp-tp50362p50387.html

Looking at some video I think the second footswitch isn't a gain mode control that add distortion, but a boost with its control pot, the Grit pot. You can include or exclude it. That pot adds gain/distortion, and a bit of volume I think.

(The V2, the one without the boost footswitch and the Blend pot, I assume it has just the Grit control, and for both the versions the Grit pot at zero corresponds to the boost off).

About the diodes... I'm not sure what they do. How you see those diodes as hard clipping in the end of the circuit before the Volume pot? Maybe. But I never tried it, and I don't know how much distortion could give to the sound. Too much? The pedal can still sound almost clean with the boost off.
Is it possible a jfet boost with soft clipping diodes, a sort of clipping stage of the Bug Muff but jfet?

I'd say the Bass/Guitar switch changes the input (or bypass cap, C1, because is the cap 1, could be the input cap). And the Bright/Wooly switch add a cap (the ceramic one?) to the ground in the end of the circuit to tame treble.
The only one electrolytic cap should be the filter. It's very hard that a pedal doesn't have one. And the 1N4001 goes to the ground (or in line from the 9v) as polarity protection.

Can somebody is good enough to find the resistors value just looking the images/video?