Hey all!
First time poster here.
I just build a Fuzz Face but there is something wrong with the sustain. Sometimes my note dies immediately and sometimes it doesn't. Now that I think about it I guess I have swapped the transistors (Q1=140 hfe & Q= 95hfe instead of Q1 = 95hfe & Q2 = 140). Dealing with ac128k's here. Also, there's a relatively loud 'thump' when I push the switch. Now before I desolder and swap them I would like your opinion on the fact if that could what is causing the sustain/'thump' issues.
Thanks!
A link to the project and/or schematic would help greatly.
Off the top of my head, I would say your sustain problem is a biasing issue and your "thump" might be due to how the pedal's power scheme is set up. More can be learned with the info I requested.
I used this layout http://tagboardeffects.blogspot.be/2010/09/fuzz-face-pnp-tagboard.html
Are your transistors socketed? I have found on some builds that socketed transistors can move a little bit when engaging a foot switch, causing a thump. Any socketed component could actually be responsible for that.
Something for consideration.....
I have NEVER built a negative ground PNP fuzz. EVER!!! Some have done it but, most have not been able to without..... switch pop!
I would suggest either building it as a positive ground pedal OR redesigning with a charge pump to alter the power scheme.