Help with debugging an Axis Wah

[kin0]

Name of the project: Axis Wah from Fuzz Central
http://fuzzcentral.ssguitar.com/axiswah.php

I built it with a prefboard I'll make a clean copy of the layout and will post it later.

I did some mods to the circuit to make it easier to tweak:
1. Instead of the 0.01uF cap and the beginning of the circuit and the 0.01uF cap after the inductor I put sockets so I can replace the caps (there are 0.01uF caps in the sockets right now).
2. Replaced the 22k bias resistor from the power to the first transistor with 50K trim, the 330ohm resistor from the 1st transistor to ground with 1k trim and the 100k resistor that goes to ground with 100k trim for easier biasing.
3. Replaced the 47k resistor which is parallel to the inductor and the 2k2 resistor under it with 100k and 5k pots for easier tone tweaking.

I think it's not a positive ground circuit.

It makes sound then bypassed but no sound at all then working. Name of the project: Axis Wah from Fuzz Central
http://fuzzcentral.ssguitar.com/axiswah.php

I built it with a prefboard I'll make a clean copy of the layout and will post it later.

I did some mods to the circuit to make it easier to tweak:
1. Instead of the 0.01uF cap and the beginning of the circuit and the 0.01uF cap after the inductor I put sockets so I can replace the caps (there are 0.01uF caps in the sockets right now).
2. Replaced the 22k bias resistor from the power to the first transistor with 50K trim, the 330ohm resistor from the 1st transistor to ground with 1k trim and the 100k resistor that goes to ground with 100k trim for easier biasing.
3. Replaced the 47k resistor which is parallel to the inductor and the 2k2 resistor under it with 100k and 5k pots for easier tone tweaking.

I think it's not a positive ground circuit.

It makes sound then bypassed but no sound at all then working.

Here are the voltage measurings:

Source (9V Power Supply) = 8.9V
Q1
C= 0V
B= 8.33V
E= 0V

Q2
C= 5.4V
B= 8.16V
E= 7.5V

2N5457
G= 8.18V
S= 8.16V
D= 8.91V

btw I set the bias trim on the original schematic value.

[joegagan]

Something seriously miswired or shorted around Q1.

[kin0]

I rechecked and the transistors are oriented right. Here is the layout:

The red wires are jumpers (cover in plastic)

That other things do I have to check?

[joegagan]

hard to tell for sure, but are you hooking up the trimmers correctly? looks like at least on has the two outer lugs connected but nothing  going to the middle. this would possibly put bias out of range?.

[kin0]

I forgot to note it out but the middle lug of the trims connected to one of the other lug (making a variable resistor).

[R.G.]

Q1
C= 0V
B= 8.33V
E= 0V

I believe that Q1 collector is not connected to the 50K trim and 470K resistor. This would cause both this issue, and the problem with Q2.

Q2
C= 5.4V
B= 8.16V
E= 7.5V

Q2 base is being pulled too high, causing the collector to be too low and emitter to be too high. This could happen if Q1 collector does not pull down the connection to the 50K trimmer. So it matches the suspected problem above.

2N5457
G= 8.18V
S= 8.16V
D= 8.91V

I believe that either the 10K source resistor is open or the gate resistor to ground (1M) is open.

[kin0]

The 50k trim and the 470k resistors are connected properly. I'll recheck the values on the trims and also I found out the connection between the Q1 emitter and the 1k trim is not done very well but there still is a connection (I'll fix it).
The 1M resistor is connected to ground too.
To what part did you refer by "10k source resistor"?