Parasite Wah - Variable Q Mod

[Stickman393]

Just wanted to share this one for anybody who's interested.

It's trivially easy to add a variable Q control to the Parasite wah. I picked this up by dissecting the Hiwatt wah pedal: that one's based on the tychobrahe Parapedal, but with a couple of small changes to the circuit.

Basically, replace R4 with a 10Ka potentiometer with a 1.5K resistor across terminals 1&2. Terminal 3 goes to the side of R4 that is common with Pin 6 of IC1, Terminal 1 goers to the side of R4 that is common with Pin 7 of IC1.

Photo:

 

[Diederick]

Just made the parasite wah . With your variabele Q mod!
Also a volume knob mod
And a 5 position Q bandwith selector
(And al the pcb mods (components)that are meantioned here in other topics)

Work very wel now and so much more versitile!

 

[Diederick]

The pedal has one little issue:
When wah trottle is in the lower frequency registers the volume is not as loud as in the higher frequency registers.
Does some one have ideas how to boost the volume of when wah pedal trottle is in lower frequenties ?