EHX - Black Finger  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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joeyshakespeare
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Post by joeyshakespeare »

I have this old black finger:
https://s123.photobucket.com/user/joeys ... k%20Finger

Issue is I have no idea where power and group from battery is supposed to go to
As you can see, someone before me tried to fix it so now there's 2 battery clips (????)
Any help would be appreciated!
blackfinger748ic.png
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Vintage EH Black Finger guts 1
Vintage EH Black Finger guts 1
Vintage EH Black Finger guts 2
Vintage EH Black Finger guts 2
Vintage EH Black Finger guts 3
Vintage EH Black Finger guts 3

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Scruffie
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Post by Scruffie »

It always had 2 battery clips, to provide bi-polar voltage :wink:

This thread should help and I think this unit is the same as yours (there was 2 versions) https://www.freestompboxes.org/viewtopic ... ger#p47642

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joeyshakespeare
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Post by joeyshakespeare »

Scruffie wrote:It always had 2 battery clips, to provide bi-polar voltage :wink:

This thread should help and I think this unit is the same as yours (there was 2 versions) https://www.freestompboxes.org/viewtopic ... ger#p47642

Thanks so much! I feel like an idiot.
1 question, do you know if each battery connect to the same lug of the switch?
I can't quite tell from the photos

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joeyshakespeare
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Post by joeyshakespeare »

Never mind, I got it working.
Thanks for sending that link, if a mod sees this, this thread can be deleted to clear up some space

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