Pretty much the same as the old Black Finger. The schematic I have for it IS exactly the same as the Black Finger.

I had one of these back in the early 70’s. It produced a really nice warm sort of rolling compressed sustain for bass guitars. How could it be the same schematics as the blackfinger? The black finger has several more buttons. I sure wish you EHx would remake these.

Here someone posted a schematic of it apparently:

http://www.freeinfosociety.com/media.php?id=4115

i just got one of these in the mail, the old black ink on silver late 60s style. i dont have much info, but if anyone needs some inner photos or whatnot, lemme know.

which it had the original knobs though, these ones all point in random directions.

I just got my vintage BlackFinger in the mail yesterday.

My impression of this pedal is that it sustains beautifully, and the tone control has a huge range that is very useful.

However, with my unit, I get a faint bit of harmonic distortion when playing certain clean chords. It is less audible when using low output single coils, and very audible when using humbuckers. I don’t hear it when playing lead lines, just on certain chords like an open G major.

Being that this unit is over 30 years old, and one of the first stompbox compressors made, it wouldn’t surprise me if this was just a limitation of the design; but I’d like to know if anyone else has this issue with their unit just to be sure mine doesn’t need some tweaking.

I’ll post a soundclip later for comparison.

[img]http://i19.ebayimg.com/05/i/001/43/e7/4caa_3.JPG[/img]