Vintage mummy Bad Stone fix? – Electro-Harmonix

This topic has 3 replies, 2 voices, and was last updated 13 years, 10 months ago by The EH Man.

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September 14, 2010 at 1:07 pm #80730

fernieite
Participant

I just got this old Bad Stone. It doesn’t work however. I’d sure appreciate anybody’s help. Here’s a link with photos. Thanks a lot.

http://stompboxes.co.uk/forum/viewtopic.php?f=10&t=7841

September 14, 2010 at 1:12 pm #111404

The EH Man
Moderator

For starters, your pedal isn’t 18v. It’s +9/-9. The black wire from the positive supply and the red wire from the negative supply go to the switch. There should then be 2 wires going from the switch to the board. The chips are LM324 and may be the culprits.

September 14, 2010 at 1:31 pm #111405

fernieite
Participant

Thanks Ron. There are two wires going from the switch to the board. Are you saying there should be two others? I corrected the 18 v remark – thanks.

September 14, 2010 at 2:02 pm #111406

The EH Man
Moderator

Quote:

Thanks Ron. There are two wires going from the switch to the board. Are you saying there should be two others? I corrected the 18 v remark – thanks.

4 wires total on the switch. 2 to the board, 2 to the batteries.
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