EHX - Opamp Big Muff π - V4 Circa 1978 (EH3003B)

A collection of original layouts for vintage guitar effects. If you want to build real replica's of vintage pedals, this is the forum you want to look at.
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peps1
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Post by peps1 »

Reworked the old THE OP-AMP BIG MUFF π - VERSION 4 Circa 1978 (EH3003B)

Old: https://i55.photobucket.com/albums/g146 ... yOut-1.png

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THE OP-AMP BIG MUFF π - VERSION 4 Circa 1978 (EH3003B) layout
THE OP-AMP BIG MUFF π - VERSION 4 Circa 1978 (EH3003B) layout
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THE OP-AMP BIG MUFF π - VERSION 4 Circa 1978 (EH3003B) layout components
THE OP-AMP BIG MUFF π - VERSION 4 Circa 1978 (EH3003B) layout components
firstopampboard-2.jpg (30.84 KiB) Viewed 3226 times
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bumblebee
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Post by bumblebee »

(Necro reply)
peps1 wrote: 27 Apr 2010, 12:46 Reworked the old THE OP-AMP BIG MUFF π - VERSION 4 Circa 1978 (EH3003B)

Old: https://i55.photobucket.com/albums/g146 ... yOut-1.png

New
ICBM.png
firstopampboard-2.jpg
I drew that PCB and IIRC there’s one mistake in it to one of the IC connections. I updated it long ago and will repost it (and that whole DIY layout and BOM) here at another time.

Edit: the PCB is correct. I’ll still upload the full size DIY files.

Edit: I just realised we had a conversation about this project ten years ago on the other forum. :D
I’d long forgotten who you were, sorry. That tracer thread we were talking in coincided with me dropping out of diy pedals for about 8 years. I never did reply to it again. I only started building again last year and I only done two that I needed. I just build what I need these days and don’t experiment much with circuits like I used to, although the interest is still there....obviously, or or I wouldn’t be here.

All good. :mrgreen:
I so dislike the modern digital world that I need to use semi-digital effects to emulate the analog world of cassette, VHS, and vinyl.

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