Pedal Noise Problem

[awgearhart]

I'm building a Brian May Treble Booster with an input cap switching mod, and have run into an issue. When the effect is bypassed, the guitar signal is gone and there's a hum/buzz sound. When I turn the effect on, it is a little noisy (but this may just be how the pedal is designed).

I breadboarded the circuit before soldering and it worked excellently. I think this must be some sort of grounding or input jack issue. What's most concerning is how there is no guitar signal and a loud hum when bypassed.

I've posted a pic of the guts of the pedal as well as the wiring diagram I used for the pedal with a few adjustments:

1. I added a 1M resistor from the Pot output to ground (to help with switch popping).
2. I saw many people say to flip the orientation of the transistor (2N5088) as shown in the diagram, but it worked correctly when I wired it to the diagram.

[blackieNYC]

It works when not bypassed?  Sounds like the switch is wired wrong for the bypass position.

[antonis]

2N5088 is wired correctly as it is..

I'm with blackie for switch miswired..

[awgearhart]

Yep. I found the problem.

I had incorrectly wired the bypass position. Also, I changed my pot cause it seemed a little scratchy. Everything sounds great.

[awgearhart]

I also wired using the grounded input configuration on the foot switch.