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Vintage threads from the first ten years

Little Big Muff???

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2/14/1997 12:24 PM

Little Big Muff???

Dear all,

I recently discovered a suspicious looking stomp box from my local music store and just bought it out of curiousity. There was no indication whatsoever of what it actually was but after close scrutiny I could make out "Little Big Muff (Pi)" and it does look like the ones in the pictures, one slide switch, a stomp switch and a knob. Puzzling thing is, when I opened it up, I found two RC4558 ICs instead of transistors! Did they make LBMs with 4558's ever? If they did I wonder if any of you guys have a schematic, 'cos it doesn't work. Maybe some guy switched the guts? Please advise.

2/19/1997 11:42 AM
P Freuler	I have some old EH schematics for the Big Muff Pi, and they indicate that a later version of the Big Muff Pi did indeed use op amps in place of transistors. I have to assume that they did the same with the Little Muffs.

3/4/1997 5:10 PM
Steve Morrison	I can confirm that, as I worked on a Little Big Muff not long ago and it indeed had op-amps. In fact, it would seem that the Big' and Little' of that era actually used the same circuit board. There were pads on the board that were obviosly intended for pots. but had fixed resistors installed.

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