square wave wrote:Without opening a Wah Rocker and seeing what they use, I couldn't tell ya. What I would do is try several different standard types (2N5089, MPSA18, etc) and see if they have any significant effect on the sound.
shredgd wrote:Great news! After all this time, and keeping my build unused in a drawer, I finally realized what was wrong with it: I compared the schematic of the WR3 with the "Dr. Quack" schematic, which is different but uses the same principle, and saw that C11 in the WR3 schematic was just too small! That's why I had to play so hard to make the "gate" open, and the loud peak I heard was just me hitting the strings too hard to have the desired effect,
So the problem was a mistake in the WR3 schematic: C11 should read "223" (i.e. 22nF, or 0.022uF if you prefer) and NOT "222" (2.2nF, way too small to pass your signal in the "wah" section).
Now the circuit works as it should: by adjusting the threshold control, you can even get the "gate" open by tapping or slapping softer or louder.
That's some real satisfaction!!
Giulio
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