Little Big Muff schematic

[disorder]

Hey all, I'm on the hunt for a schematic of the original Little Big Muff. The one knob and tone switch version of the Big Muff.

I'm wondering... did the Little Big Muff use both opamp based and transistor based circuits? I found two schematics.

Opamp ... http://www.diystompboxes.com/pedals/lbm.gif
Transistor ... http://fuzzcentral.ssguitar.com/schematics/littlebigmuffschem.gif

Is there a way to tell from the outside what circuit is inside?

[Mark Hammer]

The LBM was generally a BMP, but with the "Sustain" fixed at max or near max, and a two-position switch mimicking full bass and full treble.

Funny how there was a time when such things would have made the difference between two catalogue items with different retail prices.

[disorder]

It is interesting, back then it took less to get more excitement out of people I think. The internet and us schematic hunters ruined the mystique maybe? I see lots of boutique builders offering one knob versions or mini versions.

My girlfriend has been playing more guitar and she asked me to build her something similar to the pedal one of her favorite guitarists uses, which I found out was a vintage Little BMP. Now if I could just decide transistors vs opamp.

[nocentelli]

I can't believe either position on the tone switch is much use  - Who sets the tone pot on a BMP full on or off?

[disorder]

https://youtu.be/eSQpv2SF8uQ?t=45m6s

Little big muff into a JCM800.

[Mark Hammer]

I can't believe either position on the tone switch is much use  - Who sets the tone pot on a BMP full on or off?

Nobody.  You will note the LBM no longer exists.

[Blitz Krieg]

I don't think you can tell if it's an op amp or transistor from the enclosure.

http://www.ehx.com/forums/viewthread/3083/#23712

http://www.ehx.com/forums/viewthread/5768/#34642

[teemuk]

Now if I could just decide transistors vs opamp.

Whichever you choose should not make a big difference in this case.

http://www.diystompboxes.com/smfforum/index.php?topic=111504.0

The evident circuit architecture differences of the Opamp Big Muff vs. various discrete Big Muff versions probably introduce much more audible effects than whether the amp enclosed into feedback loop is a single-device discrete circuit, or an integrated and more complex one (e.g. generic opamp).