Built a Big Muff, it works but doesn't have much gain, gain not working properly

[scotthands]

hey was just wondering if anyone could help.

I built a russian green big muff and it works but doesn't seem to have much gain at all, when i breadboarded it it had loads of gain and sustain for days. Checked for solder bridges but there weren't any.

Q1
C = 4.28
B = 0.68
E = 0.07

Q2
C= 6.5
B= 1.1
E= 0.71

Q3
C = 1.06
B = 0.65
E = 0.02

Q4
C= 3.26
B= 1.2
E= 0.58

[scotthands]

It seems that the diodes aren't causing any clipping( i checked with audio probe)

[scotthands]

when i plug it into a 'scope (ghetto computer one) it seems that the sustain and volume are just both working as volume controlls.

any ideas?

[Tonemonger]

I just checked one out - You seem to have a problem at Q2 (collector should be around 4V).

[scotthands]

Yeah i think it's somethin to do with Q2, i used my audio probe and everything is fine until  Q2, the base is getting a good signal but there's no signal on the collector.

[bumblebee]

Here's some voltages (+/- naturally):

TRANSISTORS 2N5088:
1981 3034

Q1
E       B       C
.03    .63     3.98

Q2
E       B       C
.03    .64    4.00

Q3
E       B       C
.03    .63     4.00

Q4
E       B       C
1.22   1.82   4.00



TRANSISTORS 2N5088:
NYC RI 3003-A

Q1
E       B       C
.05    .65     4.34

Q2
E       B       C
.18    .77     4.71

Q3
E       B       C
.16    .75     4.62

Q4
E       B       C
.99    1.57   4.28