Here is a short photo essay on how to build a Wah Wah - in this case the Wizard Wah Wah, but the board can be used to build any non buffered wah pedal from a GCB95 Cry Baby through to a Vox V847 etc etc.
Just change the component values to suit.
First up the layout artwork:
the PCB tracks:
the PCB tracks laser printed onto transparency film
the PCB material I use:
the white protective plastic layer - marked out and ready to cut:
Cut to size - and the baby saw I used:
the coated PCB with the protective film removed - under the transparency with a sheet of glass on top of it - ready to expose to Ultraviolet light:
the homemade ultraviolet light - Philips sun lamp:
after 30 seconds exposure the dark green coating turns blue:
the chemicals used to develop the exposure and to etch the unprotected copper:
the board after 30 seconds in the developing solution - no more dark blue colouring, only dark green protective coating on the unexposed tracks remains:
in the etching solution - after a couple of minutes - you can see the copper being eaten away and the liquid turning blue with the copper sulphate being produced:
the etched board - off to the drill press we go:
the board drilled and lightly sanded to remove the protective coating on the copper tracks:
the board with the layout paper glued to the component side and the holes punced through with a pencil compass poiter etc:
the board all populated and ready to wire in the chassis:
the solder side:
another shot of the completed board - note the BC550B transistors used - I did not have any BC239B types. Also note the 1k6 resistor made by joining a 1k5 and 100 ohm resistor in series, and the 360 ohm resistor made with a 330 ohm and 33 ohm in series - well allright - 363 ohms - close enough for rock n roll. the Fasel has 619 on top - that is the measured inductance, so I will have to fine tune one or more of the 15n and 220n capacitors probably:
More to follow in the next few days
cheers
bajaman
Or maybe my new fuzzy/OD 
