bazz fuss tone control

[shooter_mi]

I've spent some time with the bazz fuss circuit today, and now I'm looking to continue the fun into tomorrow. What I've got right now is a perfboard with the first homewrecker bazz fuss (1n914 diode and 2n3904 transistor) and then, on the same board, the same thing but with a MPSA13. I like the sound of the MPSA13 a lot better. Then I tried wiring the two circuits together in series and the result was a truly gruesome mess (very cool, although I was disappointed that it didn't render an octave up like the buzzbox description promises).Ultimately, I will build a pedal that allows me to activate both the fuzz of the MPSA13 and the gruesome mess of the MPSA13 and 2N3904 in series. I'm fairly sure I'll wire these in series, with a footswitch to activate each, but I'd like to add a tone control. What value pot would be a good tone control, and where should it be wired?

[fixr1984]

Do a search on the Big muff tone control.
that should give you and idea what to do

[tommy.genes]

Here's a Bazz Fuss I did with a BMP tone control I did a while back, but with substituted resistor and cap values. Details are in the build report.

http://www.diystompboxes.com/smfforum/index.php?topic=38682.0

I'm also putting a BMP tone control on a Smash Drive right now. It's a very handy little circuit snippet.

-- T. G. --

[mattpocket]

Click on DIY FAQ at the top right of the page, and click the link referring to modifying your pedals, its one of the first in the list of blue ones at the top, near where it says something about learning in the forum...

Click the link about the mods, and there are loads of dead good tone controls, and they are all a piece of cake to sub into your circuit.

Matt

[Meanderthal]

 The mpsa13 might have enough gain to bulldoze its way through, but otherwise the BMP tonestack will have enough of a volume drop that ya may need a gain recovery stage after it... still worth doing though! I also like Mark Hammer's stupidly wonderful tone control for even more flexibility outta one knob.

Did ya get Duncan's Tonestack Calculator yet?

Edit: Hey, wouldn't that be the whisker biscuit? I built that, sounds great, but noisy as hell.

[shooter_mi]

First off, I apologize that this is a tired topic for most.

Thanks for the advice, everyone. The Big Muff tone control worked pretty well. I tried it with the values in the FAQ, those suggested by Tommy Genes, and a few others. Eventually I found a combination that works for me. The MPSA13 is hot enough to plow through a BMP tone stack, by the way. With room to spare. I also tried to stick a 100K pot just after the input to garner a gain control, but, like home-wrecker .com says, this circuit sounds best at full gain. Instead I've got a circuit with MPSA13 and tone stack, with a duplicate 1n914 circuit switchable in series. Both circuits in series are completely unmanageable, and I like having the opportunity for chaos at hand.

For the record, and anyone searching on the Bazz fuss, great beginner project, lots of tweaking opportunities, and great for bass and treble guitar. I've got mine set up so that both sound pretty slick on it.