I have a positive ground fuzz face, with OC44's. It sounds good; but it needs more volume.
When I turn up the volume pot to max, then the volume is around unity gain.
- Is this normal?
- Is there a way to increase the volume of the fuzz face?
Here is my layout:
(http://members.lycos.nl/carrejans/temp/Fuzz.GIF)
If your "R4" is 330 or 470 ohms you can try changing it to a 1K ohm resistor. This is similar to the contour control in the Fulltone 69 pedal, it will give you more volume but it will change the fuzz characteristics slightly...
Think about R4 and R5 being a potentiometer...
As for "normal", I can't say, but in my experience with the volume pot cranked on a fuzz face, I think the technical term is "freakin' LOUD". Certainly nothing that could be mistaken for unity gain. At least not at moderate stage volumes with a medium power tube amp. My experience is limited to a pretty small sample size however.
I find with a strat it goes above unity gain but with a les paul it doesn't.
R4 and R5 form a resistive volage divider...how the voltage is proportioned depends on the values of these resistors...make R4 a little bigger and the division of the signal will be altered, more will be fed to the output.
But a ''generally specific'' debug check to see how the DC bias etc. is set up would be a good 'pretest' because the FF 'should' put out a greatly amplified version of the input source.
Thanks for the replies guys.
A friend of mine asked if I had a fuzzface, that he could use. I remember, I built one some time ago. I remembered that the volume was lacking. For that reason my question.
Today I actually tested this pedal again. And to my surprise it had enough volume. :icon_redface:
Now I remember what was "wrong" with it:
When the volume pot is at half, there is not enough volume for me. (with most modern pedals that I use, putting the volume in half is good for me)
So I have to put the volume pot at about 3/4. No problem, so far at my home.
But when I play at a higher volume on my amp, at rehearsals/gigs, the fuzz face starts to squeel like hell.
How can I best solve this problem?
Thanks...
carrejans
Quote from: carrejans on January 12, 2012, 02:31:48 PM
But when I play at a higher volume on my amp, at rehearsals/gigs, the fuzz face starts to squeel like hell.
How can I best solve this problem?
Thanks...
carrejans
possibly, the standard 50-200pf cap across Q1 and/or Q2's B-C