GGG mod wah problem

[mnordbye]

I'm building the Mod-able Wah Wah from GGG atm, and have run into a problem. There is a wah sound when engaged, but when i rock the foot, there's no change in the tone, or frequency or whatever we might call it. It's just the same wah sound. Any advise on what might be wrong? I

I've built the mod-wah with no switching between caps or inductors or whatsoever. Just a plain easy wah.

Magnus Nordbye

EDIT: By the way, i guess the inductor doesn't have a special pinout?

[mnordbye]

Measured and all the resistors now, and they seem to be okay.

One thing though. When i turn R7b (a trimpot), the resistance of R7a (regular resistor) changes. Is it supposed to be like that? To me, it only sounds and seems unlogical.

Link to layout: http://www.generalguitargadgets.com/diagrams/wah_mod_lo_no_switches.gif

[mnordbye]

bump. anyone?

[mnordbye]

Hmm, can the pot be the problem?

[ayayay!]

The pot may be the problem, but I'd suspect the way the pot is wired is wrong.  Does the "wah sound" that's coming out sound like it's fully toe-down or fully heel-down?  If so I think you've got the pot wired up wrong.  Also check those caps c4 and c5.  Maybe one of those is floating?  (resolder them and check polarity if they're electrolytics or tantalums)  Just a guess.

[mnordbye]

Okay, i'll try all of those.

It's like you say, yes, always at one place. But i believe my pot wiring to be correct.. Nontheless, i'll recheck.

Magnus Nordbye