What Big Muff is this?

[Bernardduur]

Nope;

Then the label would be "Tone Bypass"

On / Off is just the on / off knob for the battery

[tcobretti]

Ok.  I hadn't seen that before.  It's weird to me that they still put that in a pedal in the late 70s.

[Gila_Crisis]

hey where can i find a working schem and layout to build an opamp BM???

[tcobretti]

I didn't draw this and have no idea where it came from.

[theehman]

BTW, the switch is a tone knob bypass switch, and for some reason the BMPs I've heard with the switch always sound better in the "bypass" position.

The early ones had an on/off switch, the later ones a tone bypass. Isn't it just what it says on the box?

[/quote]

From what I can see of the board I'll bet it's a Tone Bypass switch.  Like I said, just using a leftover chassis.

[mongo]

that's an OPAMP big muff...

gotta love these ones I like them better that the transistor versions.

they are really easy to clone and it's even easier to implement true by pass on them. I have what I think it is an earlier model with an on/off switch.


Andy

[analogguru]

Here you can find correct schematics of the op-amp Big Muff Pi:

http://analogguru.an.funpic.de/

analogguru