I've built about 15 pedals so far with pretty minimal troubleshooting issues but this Dream Fuzz has me stumped. Audio passes through fine in bypass and when the effect is engaged the pots behave as expected except the gain is much lower than it should be, at highest gain setting it has a little crunch.
I've gone through and checked values on all the components and don't see any issues there. No leads crossed / loose wire strand either, in case the pics don't show that. I swapped both ICs with spares and that didn't help.
Using an audio probe there's a good amount of gain coming out of the first IC (JRC4558) but then after C6 / R5 the signal is pretty much back to clean, so I'd imagine the issue is related to that but I'm not sure what to try next.
I checked voltages on both ICs:
IC1 - JRC4558
Pin 1 4.3
Pin 2 4.3
Pin 3 4.23
Pin 4 0
Pin 5 4.26
Pin 6 4.29
Pin 7 4.29
Pin 8 8.6
IC2 - UA741CP
Pin 1 0
Pin 2 4.7
Pin 3 4.45
Pin 4 0
Pin 5 0
Pin 6 4.7
Pin 7 8.6
Pin 8 0
Any ideas are much appreciated.
I've gone through and checked values on all the components and don't see any issues there. No leads crossed / loose wire strand either, in case the pics don't show that. I swapped both ICs with spares and that didn't help.
Using an audio probe there's a good amount of gain coming out of the first IC (JRC4558) but then after C6 / R5 the signal is pretty much back to clean, so I'd imagine the issue is related to that but I'm not sure what to try next.
I checked voltages on both ICs:
IC1 - JRC4558
Pin 1 4.3
Pin 2 4.3
Pin 3 4.23
Pin 4 0
Pin 5 4.26
Pin 6 4.29
Pin 7 4.29
Pin 8 8.6
IC2 - UA741CP
Pin 1 0
Pin 2 4.7
Pin 3 4.45
Pin 4 0
Pin 5 0
Pin 6 4.7
Pin 7 8.6
Pin 8 0
Any ideas are much appreciated.