Two Fuzz Faces One Battery?

[Chris Brown]

I want to power two fuzz face circuits on one battery... both npn fuzzes... can anyone think of any problems that I might run in to??

I already have one box with two fuzzes and I love it...but I used two separate batteries and it's enclosure is way over-sized....

Everyone that enjoys a fuzz face should build one of these... it's really a great tool for the stage with one on/off switch and one a/b switch... you can set it up so that one fuzz is biased hot and one is biased cold... or set the both with fuzz on 10 but one at rhythm volume and one set louder for lead.... or one with some resistance at the input to soften the tone and then the other set normal for full fuzz... the list goes on and on...

Anyway... yeah... any input from the experts or the know-it-alls??

Thanks, CB

[newfish]

They're both NPN - so no grounding issues.

Fuzz faces aren't that greedy for current either I believe. 

Just wire them up with parallel power, then the second fuzz is not adversly affected by the voltage drop from the first - would be my suggestion.

Do it - sounds like a *lot* of fun!

[amptramp]

The classic fuzz face does not have bypass capacitors, so you could run into common impedance problems with the battery and wiring.  This may be no more of a problem than a single unit since only one is connected at a time.  It may be more important to ensure the unused on has a grounded input to avoid any pickup modulating the current drain and coupling into the active side.  Try it and let us know.

[petemoore]

  I was thinkin' maybe a dinky resistor/cap for filtering/separating one circuit from the other. Since FF's are high gain amplifiers and there's 2x of them, seems like it might be a move anyway, whether it does matter is another thing.
 I did a buncha 2-face [copywrite complaint] and some other name maybe you can find the threads.
 1rst FF was a mild [YAFF iirc] version, gain fixed low for a bit of Fuzz, very good cleanup at the guitar.
 It had no problem allowing the gain reduction to also not distort much the 2nd FF.
 Turn the guitar up and roaring Fuzz-Rush [tryin' to think of the Zep song that has the big roll-on of fuzz every chorus-verse transition]..like that.
 Kind of a treble-boost almost set-wah tone gets very boost-distorted w/guitar knob twist, guitar knob pot of course being 'right' [>250k with nice taper help] and bypass capped.
  YMMV and will, plenty of messin' about to the point of ending up with a tangled-failure board...tried to retry but didn't ever quite get back to the roll-fuzz-on effect again...perhaps someday I'll try again.
 

[Chris Brown]

thanks for the input! I'll work on it after the weekend (musician weekdays) is over and see how it works out.

Pete I tried to dig for your old posts but it gets harder and harder to find stuff with the search here because there is sooo much to sift through... especially when it comes to the ff circuit lol

anyway thanks a bunch for the knowledge! if anyone else has anything let us hear it 

Best, CB