Wah-wah CS-1
This prototype is based on a wah-wah made in England in 1976, which is based on the classic wah circuit designed by Brad Plunkett and Lester Kushner for Thomas Organ company.
- Printed Circuit Board (PCB) size: 58x57mm
- In-house made inductor
- It only works with a 9V battery when the instrument is connected
- Handwired heavy duty aerial jack connectors
- Modular design so you can easily change the board without soldering
- High pressure connector with gold plated pins
- Installable in Dunlop Crybaby GCB-95 with one or two screws.
Photo gallery
Traced from an original wah-wah from 1976
This circuit has been traced from an original unit made in England in 1976.
The original board features tropical fish capacitors and ZTX109C transistors. In my circuit I've used 2N3904 with hFE of ~200 but they sound too educated, so I've replaced them with a pair of BC109B with gold plated pins made with hFE ~320 and they work much better.
The potentiometer used is a Clarostat Hot Potz 1 and the sound is similar to the original unit although less aggressive and with less travel due to the pedal construction.