Vox V847 True Bypass Diagram. Armed with the knowledge you just learned we can see that the signal enters and leaves the switch on the poles middle lugs. This makes the true bypass mod a fair bit simpler than on the dunlop gcb 95 and its siblings which is nice.
This mod uses a 3pdt switch to bypass the whole circuit in the typical boutique pedal arrangement. Rather they utilized a spdt single pole double throw foot switch that allowed a 01 uf coupling capacitor from the wah circuit to remain in the direct signal path regardless of switch position. This is the true bypass wiring in its most basic form.
True bypass is the most common mod.
None of the vox wahs are buffered. Removing the standard switch and installing the 3pdt it can be done before or after the input buffer stage most of the people do it before the input buffer because is. Remove the switch and replace with the new. Looper diagram vintage jenvox italy true bypass wiring thomas organ crybaby vox v846 usa vox v847 crybaby gcb 95 rev.