Station Wah w Seagull Mod

[jcpst]

It was serendipitous that the seagull mod thread was revived shortly after I picked up the PCB for this. Thank you @Feral Feline for the straightforward wiring diagram.

Not sure how much I’ll use it. Maybe only when I wanna get far out man.

I searched the forum for the orientation of the inductor from SBP. I found one photo, but no one confirmed the placement was correct. I’ll say it here- this worked for me.

I kind of wanted to do a resonance control, but I already had a design in mind.




Link to the mod diagram:

Post in thread 'Station Wah as Seagull...'

Apr 20, 2025

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.

3PDT is your bypass stomper.

DPDT can be a 3PDT if you want to add an LED indicator to that, too.

While you could pull the FEEDBACK pot's lug-3 feed from the output jack itself or the 3PDT's output, I wouldn't recommend it — the great thing...

• Feral Feline

• 

 

[VanWhy]

Good stuff. Love that knob. How did i not know about the seagull toggle mod? I have to try this. Is that a On/On DPDT?

 

[jcpst]

Thanks! When I hand drill, it’s almost always noticeably off, so I decided to do this one intentionally offset.

Is that a On/On DPDT?

Yep!

 

[Feral Feline]

Right on! LOOKS GREAT!

Really happy to see that some of my posts actually help people, from time-to-time.

I used the same inductor in my Station Wah build and mine looks just like how you've oriented yours, so my build has some hope. I've got some debugging to do still on it.


It's interesting how you arranged your seagull-pot (trimmer) — very clever to use the 3PDT's ground lug. I may change mine to that.

The diagram was set up for a typical wah, hence the bypass 3PDT being north of the board and seagull-switch, even though the PCB in the diagram is labelled for the decidedly non-wah-enclosure based Station Wah. Just noticed that.