Silicon Fuzz questions

[robkeeler]

I built a standard Silicon fuzz.  It works but has some interesting qualities.  If I put the fuzz all the way up I get a very high pitch.  It is not a gradual onset....it just comes on at very high settings.  Also if I turn my tone control on my guitar all the way off the sound actually gets brighter!  I know my guitar is wired up correctly. Is it just I have some funky transistors in my fuzz?  I used the bc108s from futurelec.

Thanks,
Rob Keeler
www.tremol-no.com
www.framus.com

[petemoore]

Or are you working on a Fuzz Face ?

[robkeeler]

Yes

[petemoore]

I built a standard Silicon fuzz.  It works but has some interesting qualities.  If I put the fuzz all the way up I get a very pitch.  It is not a gradual onset....it just comes on at very high settings.  Also if I turn my tone control on my guitar all the way off the sound actually gets brighter!  I know my guitar is wired up correctly. Is it just I have some funky transistors in my fuzz?  I used the bc108s from futurelec.
 Sorry, quoting the whole thing here, whoever didn't like it I tried highlighting and copy/pasting but lose the page when I do.
 Fuzz knob all the way up can make FF's do that. turn the knob down a touch, or add a small resistor like at the base of Q1 to ground to squelch it.
 Sounds like you're discovering the FF's guitar volume cleanup 'feature', the clean bright boost is what I get from FF's with guitar volume attenuation.
 Read GEO 'technology of the FuzzFace, different type and gain transistors will make the circuit sound different. I use sockets for them, that way I can swap them around and see what different types or the same types but different Hfe gain transistors sound like in the circuit.Thanks,
Rob Keeler
www.tremol-no.com
www.framus.com

[robkeeler]

Thanks for the advice.........I have never heard about a pedal making one's guitar tone control work in reverse though......I really do like the craziness of this thing though ....mwahaha

[Nasse]

You have found fuzz face magig mojo

OK maybe there is some pwm thing happening that causes "tone" effect, or resonant point just changes. I have noticed similar effect when putting more than one distortion in series