MXR Phase 100

[wjp9r6]

I was wondering if anyone has successfully built the MXR Phase 100 pedal using the schematic from General Guitar Gadgets.  I have completed building it and it is not working properly.  Does anyone know for sure that the schematic and layout are correct, in particular the rotary switch wiring diagram?  Right know I'm getting some phase sound on two of the intensity settings and none on the other two.  There is a bit of noise and some wierd background oscillation sounds.  Any help would be appreciated.

Willie

[Gavin Taylor]

Hi,
 I built the Phase 100 at ggg and had the same outcome as you've had.I did a little searching here though and found some mods for the Phase 100 by Mark Hammer, which helped greatly.
I also changed some resistor values that I found on an old scheme that conflicted with the ones at G.G.G.

They are:
R42-3K9
R43-22K
R40-47K
R39-47K
R56-4K7

I still have some bugs to work out in this pedal myself ,but I hope this info helps you out.