Fuzz face without the 22uf will it work

Started by harkkam, May 23, 2009, 05:39:12 PM

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harkkam

I built my first fuzz face, and I ran out of parts I didnt have the 22uf, I dont even have a replacement. Will having a 22uf make it work or not work.

Currently it only works in bypass mode but otherwise its dead, when i press the sound or its very faint at times.

Also I used .01Uf while the dallas arbiter fuzz face schmeatic said .1uf

Will that make a difference as well

Electric Warrior

where did you get that schematic? 0.01 is right.

harkkam

I used this schematic

http://www.harpamps.com/schematics/fuzzface.pdf

The voltages I got

Q1
Base = .23v
Collector = .96V
Emitter = 0.00V

Q2
Base = .94v
Collector=.26v
Emitter = .26v

ode2no1

you definitely do need it there to work. i've tried lowering the value of that capacitor to tighten up the low end and went as low as 3.3uF, but you can't just omit it. just head to radioshack or something.

harkkam

Is one of my transistors bad...

Is Q1 Dead?

harkkam


Johan

check orientation of transistors..your voltages looks funny.
j
DON'T PANIC

col

It definately needs a cap there of some description, there are other FF type circuits that us different values though. Have you built it with NPN or PNP transistors and did you use silicon or germanium? That schematic is for pnps, is your battery the right way around? I'm sure there will be correct voltages for a FF already on here somewhere.

Col
Col

harkkam

#8
Yeah the transistor's are orientated the right way. I tried looking for the voltages but cant find them.

Could anyone point me to the right voltages...thx.

Im using PNP, with Silicon transistors 2n3906

petemoore

  Collector should be @ about 1/2v of 9vdc supply = [4.5vdc].
  The other voltages are all small, base above emitter by a bit helps [should be 1 diode drop, but I've seen 'me run with less than that].
  The 22uf is an AC bypass cap in the FF, therefore will not change the DC bias.
  Soemthing isn't pulling the collector up AFAICtell from the voltages, I'd test that the Q2CResistor is...'x' resistance from actual transistor pin to...the other resistor [1k  '?' 470R..the 'top' resistor'], testing from 'distant point' like this tests continuity as well as R value in one probing.
Convention creates following, following creates convention.

col

Voltages from my Ge one, yours should be similar,
Battery 8.45v
T1 C -0.45  B -0.08 E 0
T2 C -4.97  B -0.45 E -0.36

Col
Col