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Home › Forums › Vintage EHX › EH Big Muff Pi V4 pedal issue
I have a Big Muff Pi V4 that I purchased around 1980, which worked really well for a number of years. Recently I tried to use it and noticed, as with other forum users, the signal from the pedal is stronger than when plugging the instrument directly to the amplifier. However when I engage the foot switch I no longer get the rich tone but rather a really weak distorted sound, like the sustain is on full, but the volume is basically non existent. I changed the 9 volt battery however the same problem exists. When I flip the by pass switch there is no change. Any ideas?
just a follow up to my note above. I recently cleaned the pots which helped a little bit as I can vary the sustain / volume / tone, however I have still lose nearly all of the volume when the pedal switch is engaged. Note the board is a 3003 EH with 1979 pots, and from reading the Kite site there are several versions of this board. None of the caps look swollen indicating a blown cap. I’m hoping someone knows something about this pedal so I don’t have to have every cap/resistor checked