dpdt stomp for spst toggle

[boog]

early on i learned that when working on perfboard, it's a really good idea to test a circuit before drilling/mounting it into a box.  Soooo....after testing my twenty-two sevenths build I decided to box it up and at the last minute decided to sub a dpdt stomp for the spst toggle so i could have an extra led.  Now that i've boxed it i've got nothing, no bypass signal and an bunch o' hummmmm when i engage the circuit.  i know there could be a million different reasons (including wiring a 3pdt wrong) for this, but is it possible that subbing the dpdt is what did it?  i only ask because i recently got the foxx tone machine pcb from GGG and am using a dpdt for its octave switch and am having a similar problem there (never had any problems with pcb before).  i'm connecting the top lugs and the center lugs, leaving the bottom open. 

[Radamus]

I don't think that the switches would cause you any of the problems that you're talking about. It's basically making or breaking a connection if you're using it as an SPST. There's nothing there that introduces hum as far as I know. Hum is usually some sort of grounding issue, or at least a powering issue. Or, one of your amplifier stages is starting to oscillate.

You might want to check your primary bypass switch. There's nothing in the circuit that should affect the bypass signal, so that has to be a problem with the way you wired the bypass switch or the jacks. If the DPDT you subbed is only in the circuit, then it can't affect the bypass signal.

I hope that made sense. More Help: http://geofex.com/fxdebug/fxdebug.htm

Good luck

[boog]

i was afraid that would be the response    The hum i was referring to is that you can hear the circuit engage. it alters as you turn the knobs (even goes away when volume is all the way down).  i didn't think that what the switch controls could cause my problem, but i figured i'd ask anyway in case i was mistaken as to how i was wiring it.  the problem then is almost certainly from the input jack to somewhere in the bypass switch.  when i disconnect the wire that enters the circuit from the switch, the circuit reacts to my fingertip

[Radamus]

Check to see if you wired the input jack backwards. If you have a DMM, you can set it to the low resistance "beep" setting and check and see which wire is connecting to which part of the jack. I'm still a novice at most of this stuff, so someone else might have a better idea.

Circuits will typically react to your touch. If you have a wire hanging off of the circuit and you touch it, it will either cause some hum or mute things. That doesn't mean a whole lot.

[boog]

Almost as bad as wiring the input switch backwards: NOT CHECKING THAT YR GUITAR IS ACTUALLY PLUGGED IN!  i returned to the project after getting home from work, and down goes the chord!  i wonder how my shoes ever get tied.....