News:

Forum may be experiencing issues.

Main Menu

Problem:: Pastyface not fuzzing

Started by afrogoose, October 09, 2020, 03:46:34 PM

Previous topic - Next topic

afrogoose

Hi Everyone,

I've just finished my Pastyface build (tone bender).  Thanks Madbean for the awesome PCB!!  I'm having some trouble though.  It's not really fuzzing out.  Even with the fuzz knob cranked and the internal trimmer maxed out there's really no clipping.  When the fuzz knob is below halfway there is no output.  The volume and tone pots seem to be working as expected.  Here are my voltages.  The IC voltages look good but the GE trannies look all wrong.

IC:
1. 9.2
2. 5.43
3. 0
4. -3.72
5. -9.14
6. 4.38
7. 5.77
8. 9.2

Q1
C  -.14
B  -.22
E  -.13

Q2
C  -.14
B  -.13
E  -.14

Q3
C  -.63
B  -.1
E.  0

I used the transistors from a previous GGG tone bender build.  Is it possible I damaged the transistors desoldering them?  On this build I put them in sockets.

I appreciate any insight/help anyone has!!!  Thank you in advance!!

madbean

Since they are in sockets, try removing Q2 and Q3 then re-measure the DC on CBE of Q1. Use that as a starting point to see if one transistor is sinking current.
Also, picture of the top of board will help.

afrogoose

Woah.  Thank you for the quick reply!

So I removed Q2 and Q3 and here are the new volateges

Q1
C  -7.73
B  -1.52
E  -1.43

B and E look good but C is way off.  What does that mean?

Here is a pic