Civil War Muff Clone not fuzzing

[dune2k]

Hi,
I built a Civil War Muff yesterday using this vero layout.
When I plug it in I only get a reeeeaaally quiet signal. I started to trace the circuit with an audio probe and the first stage (Q2 on the layout) is fine but the second (Q1) isn't.
I then measured the voltages on all the transistor:
Power supply delivers 9.01V
Q1:
E 2.66V
B 0.79V
C 0.2V

Q2:
E 4,55V
B 0.71V
C 0.14V

Q3:
E 3.1V
B 0.75V
C 0.17V

Q4:
E 7.95V
B 0.79V
C 0.25V

So (emitter) voltages of Q1 and Q4 seem to be a lot off...
Any ideas? I checked the solder points with a multimeter and everything seems to be fine. I'll try to reflow the solder later and see whether that helps.
I couldn't find any solder bridges around Q4...did I forget anything there?!

Cheers,
dune2k

[PRR]

The voltages make sense if you have E and C confused.

Q1 and Q2 have the -same- bias resistors and should show very similar voltages. The difference 2.6V versus 4.5V is just maybe within the range of hFE variation.

> with an audio probe and the first stage (Q2 on the layout) is fine but the second (Q1) isn't.

I would suspect wiring to and around the Sustain pot.

[dune2k]

The voltages make sense if you have E and C confused.

Q1 and Q2 have the -same- bias resistors and should show very similar voltages. The difference 2.6V versus 4.5V is just maybe within the range of hFE variation.

> with an audio probe and the first stage (Q2 on the layout) is fine but the second (Q1) isn't.

I would suspect wiring to and around the Sustain pot.

Hi,
I checked whether the voltage difference on Q1/2 has something to do with their hfe - it doesn't.
I also had a look on the sustain pots wiring and it also seems fine...
The weird thing is that the second transistor stage doesn't seem to do much amplifing, just like the fourth one...
I also checked the transistor pinouts and they are fine.

Cheers,
dune2k

[Brymus]

I would double check,PRR is seldom (if ever) wrong.
It cant hurt to turn the trannies around and try it.

[dune2k]

I would double check,PRR is seldom (if ever) wrong.
It cant hurt to turn the trannies around and try it.

The trannies are 2N5088s and I also checked the vero layout against the schematic...I also tried to turn Q4 around, gives me about the same voltage (.5V more). It can't be hFe specific there 'cause I tried another 2N5088 (I measured their hFes and except one all are around 400).
I also redid all the solder joints (except offboard wiring) and no changes. Offboard wiring will be redone tomorrow.

Cheers,
dune2k

[dune2k]

Today I checked the wiring around the Sustain Pot and everything seems to be fine there. Still no fuzz.
I also redid all the solder points (reheated them and added some solder where needed). Still no fuzz.
Tomorrow I'll shoot some pics of both the component and the solder side...

[dune2k]

Ok, update!
I found a missing cut under R15 and added it. Now I get (loud/er) droning noises. Gonna check for unwanted connections (again) tomorrow...

[dune2k]

No help here? :/

[Kearns892]

Are you sure the transistor is still good? As a heat sensitive device, soldering and unsoldering them repeatedly may have damaged one of them. And again you may want to try reorienting the transistors.

[dune2k]

Are you sure the transistor is still good? As a heat sensitive device, soldering and unsoldering them repeatedly may have damaged one of them. And again you may want to try reorienting the transistors.

I use sockets, esp. since I want to try out different transistors.
I found the error. There's a cut under C8, which is barely visible. After placing it everything works fine.