Schumann Two Face fuzz.

[italianguy63]

Gezzz Dino... what did you do wrong in life to be relegated down to living with the hot water tank?   

[digi2t]

that is a noisy, glitchy, fuzzy horrible mess.
Which means I like it!!!!!

It sounds, like the guts of the original look. 

Gezzz Dino... what did you do wrong in life to be relegated down to living with the hot water tank?   

That room also serves as our pantry, so snacks are always close at hand.

Life is good my friend.... life is good.

[digi2t]

Here's my vero take;



It'll fit nicely into a 1590J.

Here's the updated schematic, and switching diagrams as well;

[alparent]

Is a PCB of this one also coming soon?

[UKToecutter]

patience grasshopper.........

soon.....

[kaycee]

Digi, thanks for posting another intimidating vero. Sterling work dissecting that car crash of an inside. You've got to give this guy credit for not selling your average mildly modded tubescreamer or muff circuits, all of his stuff seems real innovative to me, which makes the construction of them so darn puzzling???

[digi2t]

Well it's done!!

Bit of a wire monster, but still cleaner than the original.





The four russian transistors look like silos, full of crazy fuzzy goodness.



Controls are basically the same, except I seperated the Drive pots, and added germanium doide selection for the clamping.





The other changes I made was using TL071's instead of LF351's, 1800pF polystyrene caps for the diode clamping, and as I mentioned before, added 1N270 diodes for added craziness. the 1800pF caps replace the 33pF, and 47pF caps. I found that upping the values stabilized some of the oscillation settings. I just didn't like the LF351's either. The drive seems to be much more stable with the TL071's. 

As for the fuzz, at it's mildest, it's like the love child of a pissed off Big Muff, with an Uglyface, and a Skyripper being the crazy uncle. Very hard squarewave. From there, velcro, mosquito, octave jumping, motorboating, oscillation of every audible frequency, and then some. It's a knob twiddlers dream. Linking the two circuits, you can affect one side using the oscillation from the other. Craziness! The seperate drive pots really add to the attainable textures, and the lower Vf of the germanium doides can push the oscillation to different levels. Totally interactive with the guitar's volume, and tone knobs as well. With the right settings on the unit, you can have oscillation on demand using the guitar's controls. My fav setting right now is one where a short burst of oscillation can be initiated by pick attack. I hit a chord or note hard, and a short blast of oscillation cuts in, followed by the chord or note. Less pick attack gives you the normal chord or note. Too cool. Mixing in clean signal just adds more texture to the whole shootin' match. And then, just when you're blowing ear drums, you can kick in the boost, and melt some brain cells as well.

Video coming soon, maybe tomorrow. I still need some time to write down the settings for the demo. If I don't, it'll be like a 3 hour never ending video, and last thing you need, is my ugly puss on your screen for longer than is absolutely necessary.

[pinkjimiphoton]

wow, looks insane, dino!! nice!

[UKToecutter]

Dino,
That looks SO cool.
Guess I should get on and finish the PCB layout!!!

[Gus]

The build looks nice.

Looks like the Ge transistors will need to be selected for consistency.

I would have used 100K volume controls after the FF like sections.

I would also think about the coupling cap values the 10ufs and 2.2ufs

The clean section looks like it could be done with one opamp. It is a max gain of 6 followed by a max gain of 11.  a gain of X 66 overall.

[digi2t]

Me, and the hot water tank are back.

Here's the Two Face clone video. My longest video to date, but there's a lot going on there. Get the popcorn out.