For no apparent reason, here’s a vero layout for the Bespeco Weeper wah effect. I guess you could either set this up as a “fixed-wah” box or put it in a regular wah enclosure with foot-controlled pot.
Based on a schematic by Gottfried Divos, found here.
This effect apparently also go by a few other names with some slight modifications to the part values. I’ll see if I can add some more info on that tomorrow.
Update (23.06.2013): Substitutes you can make to create other similar effects:
| Colorsound Wah-Wah | Zvex Ooh-Wah | |
|---|---|---|
| R2 | 330K | 330K |
| R5 | 180K | 180K |
| R7 | 180K | 180K |
| R9 | 470 | jumper |
| R10 | 33K | 330K |
| R12 | same | 470K |
| C1 | missing | same |
| C3 | 100n | 100n |
| C4 | 2n2 | 2n2 |
| C5 | 6n8 | 10n |
| C6 | 15n | 15n |
| C8 | 100n | 100n |
| C9 | 2n2 | 2n2 |
| Q1 | ? (medium gain silicon NPN) | MPSA18 |
| Wah pot | same | LDR |
Update (02.09.2013): Verified as working, thanks to Clint C.
Update (12.09.2013): Not sure what I was getting at about a cut underneath R10. No cut necessary and layout has been updated. Thanks To Olav for spotting this 😉
Yes, it’s the pot labeled “Wah” on the layout: B100k. I don’t know about the oohwah.
Hi Harald, is this schematic supposed to have a wah pot? And change to an LDR in the Zvex oohwah?
Hi sim. Unfortunately I don’t have one and have yet to build this, so I still know very little.
I have one how can I improve the sound? What can I change to use with bass?