Squealing wah

An 'interesting' issue with my Crybaby last night...

I was using it with my new Aria HSS strat, on the bridge/middle position, with light overdrive. It seemed fine initially, but when I tired it later in the evening I got a high-pitched and very loud squeal when engaging it and using the full toe-down position. This held true for every pickup combination except the humbucker on its own. I'm running guitar -> tuner -> OD3 -> Crybaby -> Fender Hot Rod Deluxe, as producing less noise than if I run the wah before the OD.

Any thoughts?

(To confuse matters further I've had the occasional single-coil squealing problem before when using a coil-tapped SG without the wah, so wonder if it's more of a problem with the sound system and the Crybaby just accentuates it...)

Did yuou by chance put the input cable in the output jack and the output cable in the input jack?

I know that's how David Gilmour did those seagull noises in a couple songs.

Did yuou by chance put the input cable in the output jack and the output cable in the input jack?

I know that's how David Gilmour did those seagull noises in a couple songs.

I'd read this elsewhere just now as a possible problem. I'm 99% sure I've going into the 'guitar' side and out the 'amp' side (in to right, out from left). Wouldn't that caase a problem all the time rather than just at the extreme treble end of the sweep?

Good point, but to be honest, I really don't know. I'm not too knowledgeable about wahs (or most pedals for that matter). Maybe somebody else can chime in.

Mine crybaby cannot do the Gilmour trick :-( I have Hendrix wah JH-1B.

(To confuse matters further I've had the occasional single-coil squealing problem before when using a coil-tapped SG without the wah, so wonder if it's more of a problem with the sound system and the Crybaby just accentuates it...)

That could be the culprit. Microphonic pickups can make a crybaby squeel like a pig. Did you try another guitar? Or just guitar>crybaby> amp with no other pedals? Or maybe your amp has a microphnic preamp tube?[that is,if its a tube amp]. Just try the process of elimination,or borrow a friends crybaby and see if it does the same thing with your rig.

That could be the culprit. Microphonic pickups can make a crybaby squeel like a pig. Did you try another guitar? Or just guitar>crybaby> amp with no other pedals? Or maybe your amp has a microphnic preamp tube?[that is,if its a tube amp]. Just try the process of elimination,or borrow a friends crybaby and see if it does the same thing with your rig.

It's true that there a lot of variables to work through! With limited time at the venue to check all these things it makes it difficult to track the root of the problem down. I'll just have to come up with a checklist to start working through.