Big Muff Help

[markrocknroll]

OK, I have built a couple of General Guitar Gadget kits and they have turned out well. Currently putting together a Triangle Big Muff Pi kit from GGG. Everything is per the kit and this schematic: http://generalguitargadgets.com/pdf/ggg_bmp_tri_sc.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a
and this wiring diagram: http://generalguitargadgets.com/pdf/ggg_bmp_wiring.pdf?phpMyAdmin=78482479fd7e7fc3768044a841b3e85a

When I was done I connected a 9v battery and connected it to a small amp. There is no signal passed in bypass or when turned on. The LED does light.
I have checked my wiring and solder joints.  I have done continuity checks across the whole board and footswitch and it seems connected. I have done grounding checks to every grounding point and it seems fine. I have checked continuity from the input jack to the output jack and that is good.  Today I plugged in live amp to the output jack and tapped on the tip lug of the output jack. There was no sound.

It seems like I am missing something very obvious. Can anyone help?  Thanks.

[dwmorrin]

There is no signal passed in bypass or when turned on.

Your wiring diagram shows true bypass, so if no bypass signal, you've definitely made a wiring error either with the in/out jacks, or the stomp switch.  Check the orientation of the switch, the lugs of the jacks, and post a picture for us to look at if you can't figure it out.

[markrocknroll]

I've checked and rechecked everything.  Maybe I've been looking at it too much. Here are 3 pics:







Links to pics:

https://www.dropbox.com/s/iwuqaoby2yi7ppm/bmp_switch.jpg

https://www.dropbox.com/s/ipdgi8iiryslgri/bmp_jacks.jpg

https://www.dropbox.com/s/rctuh6gb395dmv2/bmp.jpg

thanks

[dwmorrin]

The tip springs on the jacks look very close to the back of the pots.  Stick a plug in there, and then measure from tip to ground.  Might be shorting.  Rotate jacks as needed.

[markrocknroll]

Up and running. Per your advice, I checked if it was shorting on the pot. It wasn't but I found the jack was shorting on the side of the box.  It sounds fantastic! Very happy. Thanks for the help.