Station Wah as Seagull...

[Chuck D. Bones]

As long as you can turn the guitar tone and the fixed wah freq both at once, you're good. I prefer the normal wah, but they both do the same thing. In any case, the circuit has to be the CryBaby GCB-95, CGB-100 or earlier. The 535Q will not work because it has buffered output. And you can forget about trying this with the ParaPedal, it's a completely different circuit.

 

[Bricksnbeatles]

@Chuck D. Bones the inductorless opamp-based design of the Park And Ride wouldn’t have any points in the signal path where oscillations could be picked up, right?

 

[Big Monk]

As long as you can turn the guitar tone and the fixed wah freq both at once, you're good. I prefer the normal wah, but they both do the same thing. In any case, the circuit has to be the CryBaby GCB-95, CGB-100 or earlier. The 535Q will not work because it has buffered output. And you can forget about trying this with the ParaPedal, it's a completely different circuit.

I have a Tearjerker, a 500kA pot and an extra short toggle DPDT.

I know what I’m doing this week!

 

[Chuck D. Bones]

@Chuck D. Bones the inductorless opamp-based design of the Park And Ride wouldn’t have any points in the signal path where oscillations could be picked up, right?

That tone, and the ability to make it they way Mr. Gilmour did, is unique to the CryBaby circuit.

Is there a way to make the Park & Ride oscillate by connecting a guitar's pickups to the right place in the circuit? Maybe. Doubtful. Even if we could make it oscillate, it would have a very different tone & feel from a CryBaby hooked up backwards.

 

[Big Monk]

Ok Gents.

I have some yard work to do today and while I’m outside I’ll bring a print copy of the @Chuck D. Bones Gilmour diagram and plan my drilling.

Since I have a Tearjerker, I need to plan my holes to minimize and additional wiring. I’d like it to be as simple a retrofit as possible.

 

[Big Monk]

 

[Big Monk]

The seagull has landed! Bird sounds abound!:

My 8 year old son had the idea to turn on the Mooer E-Lady (his favorite pedal on my board) and there are some trippy sounds going on in there with it on.

One thing I noticed, and it makes total sense, is that everything in the chain before the wah doesn’t interact in “bird” mode. That means my fuzzes.

 

[Chuck D. Bones]

One thing I noticed, and it makes total sense, is that everything in the chain before the wah doesn’t interact in “bird” mode. That means my fuzzes.

You have to connect the wah directly to the guitar for the Seagull tone to work. No buffered bypass pedals, nothing. Nada. Zip. Zilch. Bupkess.

My modded Crybaby has a RANGE switch and Q-control à la the Dunlop 535-Q and they do some interesting stuff too.

 

[Big Monk]

You have to connect the wah directly to the guitar for the Seagull tone to work. No buffered bypass pedals, nothing. Nada. Zip. Zilch. Bupkess.

My modded Crybaby has a RANGE switch and Q-control à la the Dunlop 535-Q and they do some interesting stuff too.

I guess what I meant was that I have my fuzzes first in line because I like fuzz into wah better than the opposite. So I can’t kick the fuzzes on with the bird sounds.

Not a huge deal. Just an observation.

 

[Chuck D. Bones]

It was mainly a warning to others. Did you find the warble tone?

 

[Big Monk]

It was mainly a warning to others. Did you find the warble tone?

With the pedal rocked back to the bass end?

I think I found it. With the pedal rocked to around the Q spot, I get a warbly tone with the tone control rolled up to about 3-4.

 

[Chuck D. Bones]

Cool shit, huh?

 

[Big Monk]

Cool shit, huh?

Really cool. I’m glad I had some time today to do it.

I clean up the wiring a little and move the ground off the Freq pot:

 

[ac30irons]

A little background first. When David Gilmour recorded that famous "seagulls in outer space" tone, the CryBaby had the classic two transistor design. Same as the Tear Jerker, but without the DIP switch and trimpots. The output is taken off of the collector of the 1st transistor. This point is inside the feedback loop that controls the filter freq and it has a high impedance. The high impedance makes it sensitive to loading and the location inside the feedback loop means it could, under the right conditions, lead to oscillation. Guitar pickups are highly resonant and the tone control affects the resonant frequency in a big way. By happy accident, Gilmour discovered what happens when you connect a guitar to the CryBaby's output jack. The entire circuit breaks into oscillation and that signal is present pretty much everywhere. The input jack is one place to pick up the signal, but you could just as well get it from the output jack or other places in the circuit. When I tried hooking my GCB-95 backwards, I got the seagull tone, which surprised me because that design has a 3rd transistor installed as an input buffer. It's the same circuit as the Station Wah. The Seagull tone passes backwards thru Q1. If you want to be able to control the volume of the Seagull tone, then a good place to pick-off the tone is at or near the collector of Q2. I recommend connecting an A500K pot with pin 3 at the board output, pin 2 goes to the Gilmour switch and pin 1 to ground.

Here are the details of how to do it with the Station Wah. Other CryBaby derivatives such as the Tear Jerker and ShamWah can be implemented in a similar fashion. Only 2 new parts: VR2 and S2.

View attachment 15910

Dear all, hopefully someone will pick this up.

I am considering building this Fixed Wah with a I/O flippy switch (done this before on Vox Wah). I have noted that there is a volume control on this guide but where exactly does each lug on the A500k get soldered too? I have no idea how to read a schematic.

Thanks in advanced.