Author Topic: A/B Box Not Working as Planned  (Read 3023 times)

blacklightruckus

A/B Box Not Working as Planned
« on: May 12, 2012, 05:55:22 PM »
Long time lurker, first time builder!

I'm making an A/B pedal that I found on the beavis audio web pages:



My wiring appears to be correct, but when I plug it in, I get a loud hum on one click, and nothing on the other. When I get the loud hum, both LEDs light up.

Heres a few pictures of my wiring (extra large, and don't worry about the big chunk I took out trying to drill this sucker):



blacklightruckus

Re: A/B Box Not Working as Planned
« Reply #1 on: May 12, 2012, 06:45:31 PM »
My current thoughts are that the 3pdt switch is wired 'sideways'

any thoughts on that?

Quackzed

Re: A/B Box Not Working as Planned
« Reply #2 on: May 12, 2012, 07:37:20 PM »
i'll second that. i think the lugs switch edge to edge not flat to flat..

l    l    l 
:   :    :
l    l    l

l    l    l

not

_   _   _
_:  _: _:
_   _   _

?!? i think, not sure how you wired it...
nothing says forever like a solid block of liquid nails!!!

blacklightruckus

Re: A/B Box Not Working as Planned
« Reply #3 on: May 12, 2012, 08:05:03 PM »
Indeed I did. Sucker works perfect now that I rewired it with the correct orientation!