no fuzz no face

[kvb]

I waited a couple o days of messing around trying to figure this thing out before this post.

I'm using the NPN version schem from Jack at Musique.

there is signal coming through the circuit - without the battery connected, that is.

as soon as I hook up the power, the signal gets even smaller.




I bought a mulitimeter (radio shack) thinking that it would be helpful - I'm ready to throw it out the window. 

[burnt fingers]

There is really no one suggestion.  You need to read throught the what to do when it doesn't work and recheck all  your solder joints battery connections etc.... verify the pinout of your trannys and make sure they are oriented correctly.  There are a lot of things it could be and you just have to systematicly eliminate them one by one. 

Scott

[finkfloyd]

Hi,

Try double checking your connections, and re-flowing the solder on each one

Also what transistors did you use?, as sometimes you should use a trimpot to bias them

Joe Gagan's Easy Face is a very nice sounding Fuzz Face and very easy to build on veroboard

[kvb]

I'm using the Shack's 2N3904.
I tested each in my working lpb-1.


My multimeter skills are making it difficult for me to follow the WTDIIDW checklist. This thing is brand new, and it doesn't seem to be measuring anything.

O well. I've got some vacation time coming up, Maybe I'll just get some more parts and try again.

[The Tone God]

My multimeter skills are making it difficult for me to follow the WTDIIDW checklist. This thing is brand new, and it doesn't seem to be measuring anything.

Filling out the information from the "What to do when it doesn't work" sticky helps us help you. Without the information just about any advice we offer is just a stab in the dark.

So to that end what part are you having trouble with your multimeter ?

Andrew

[fixr1984]

Double check that the input and output jacks are hooked up correct.
Ive had similar problems and the was the fix for me. For some reason
I had the + and - of the jacks hooked up backwards.

[kvb]

I read the manual for the meter and learned it has a fuse. At least now I know why it wasn't working properly. Now I just have to figure out how to USE it properly.  I'll start going through the checklist now/soon.

[kvb]

http://www.muzique.com/schem/index.html Fuzz Face distortion

I have a better picture I'll edit if I can find it

OK, here's the numbers.

Batt. 9.4v
v in 9.39

Q1 2n3904
C 1.64v
B 0.5
E 0

Q2 2n3904
C 0.96v
B 1.64
E .95

R1 31.7kohm  (combination of two series R - volts drop from 6+ to 1.6v after first R)
r2 358
r3 9.96
r4 99.8

c1 2.38uf*
c2 **
c3 .095

* c1 is a nonpolarized electroytic (it's all they had)  **c2 reads ok (22uf) when it is not attached/ reads overload when connected.  Maybe C1 needs replacing

the circuit has its own bypass switch, it is the same enclosure, in front of a working LPB-1

Q: what's more important with the resistors, their resistance or the passing voltage?
I read somewhere that the transistors need 4.5-6.1V

If I've missed something let me know.