A contribution drom Jordan Fontaine, sort of a Big Muff on steroids...
t's a Big Muff with a
bass booster that can be blended in between Q2 and Q3. The overload of
low end and volume freaks out Q3. The circuit goes from fairly standard
muff to sputtering and gated goodness. I find Sustain and Overload both
set around 1 or 2 o'clock gets the best sound. The tone stack is fairly
flat. The Mid Shift switch gives back some of the standard scoop and
makes full CCW much darker for doomy sounds. The switch ends up being
fairly subtle and can easily be omitted.
The build is verified by both my build and Fuzzonaut who gave it good review.
Thanks! Any chance for the EUNA / Sceptical Buffer from PedalPCB?
ReplyDeleteEUNA is added to list....
ReplyDeleteThis looks snazzy Jordan.
ReplyDeleteThanks. I am very proud of how the circuit worked out. I noticed I had the transistors listed wrong so I sent a fixed layout to Anders. No doubt it will be up soon.
DeleteThe updated layout is up.
DeleteWhich way do the led go in??
ReplyDeleteMan, no matter how hard i try to proof read i never get it all right. Ha.
DeleteIt doesnt matter as long as they are opposite. So let's say the left led is negative on top and the right led is negative on bottom.
Awesome thanks for the info!! And the sweet layout!
DeleteIs the volume supposed to act as a blend between the more standard muff sound and the sputtering fuzz? That's how mine is working right now, wired as shown it doesn't reduce the volume for me.
ReplyDeleteOverload is the control that blends between stock and the blown out sound. Volume is still just volume. Perhaps some wiring is mixed up.
DeleteIs there a sound sample somewhere? I'd love to give this a go.
ReplyDeleteSeeing that schematic makes me wonder what would happen if I place a Green Ringer there instead of this overload section, the blend knob gives a lot of applications.
That is a cool idea. A very cool idea...im gonna give it a try. I'm thinking a stock rams head would be particularly good for that.
DeleteIf you try it i would say to keep.Q6 or you will have phase inversion problems. Plop that Green Ringer in-between r24 and c17.
Sorry, no sound sample. I keep meaning to but you know how that goes
My thoughts exactly, maybe even use the EQD Tentacle setup instead for the additional recovery stage.
DeleteYou have got me down a rabbit hole now. I'm pondering how to put an eq there. Make it like an infanem driving notion sorta. The possibilities are great. Thanks for making me hyperfixate.
DeleteMaybe we can solve the rat vs muff debate and put a rat in there. Haha
DeleteMy only concern is how badly the Octave might track after two gain stages (albeit the LED clipping might help). Maybe it's worth putting it after Q1 instead? The green ringer can be picky with what signal comes into it, but the Tentacle version plays a bit nicer.
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ReplyDeleteAwesome layout! Going to give this a whirl sometime later this week. Any possible subs for BC549c - or should I order some?
ReplyDeleteYou could easily go 2n5088 or 2n5089. I played with a lot of transistors and liked the BC549c the best. It is a pretty subtle difference in a circuit that is gonna swallow everything up. You'll see. :)
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