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PostPosted: Mon Sep 26, 2022 6:30 pm 
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I just finished building a wah kit, and added in an LED by using a 3PDT board. I have sound when in bypass, but when I engage the foot switch, the LED lights up, but there is no sound. The only other mods I did was to mount the Q and Volume pots to the enclosure, the others I preset and marked before installing.


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PostPosted: Mon Sep 26, 2022 6:33 pm 
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Another picture


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PostPosted: Mon Sep 26, 2022 8:57 pm 
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I have reflow the solder 3 times, and it's still not working. Here's a pic after the reflowing


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PostPosted: Tue Sep 27, 2022 11:32 am 
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Location: Moses Lake, WA
Please provide voltage readings for your transistors and the op amp.

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Please do not PM me. email is prefered. keith@buildyourownclone.com


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PostPosted: Tue Sep 27, 2022 2:42 pm 
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Transistor 1-
Collector=9.38v
Base=9.01v
Emitter=8.99v

Transistor 2-
Collector=9.40v
Base=8.96v
Emitter=8.98v

OP Amp-
1=8.98v
2=8.62v
3=8.71v
4=9.16v
5=8.99v
6=8.62v
7=9.40v
8=0.0034v


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PostPosted: Tue Sep 27, 2022 4:53 pm 
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Those are way off....to the point where I don't think you are taking the readings correctly. Are you sure you have it set for DC?

Take the op amp out of its socket and measure the empty socket

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Please do not PM me. email is prefered. keith@buildyourownclone.com


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PostPosted: Tue Sep 27, 2022 5:42 pm 
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Ok, here are the measurements with the OP amp out, just the empty socket.

1=.008v
2=7.50v
3=8.40v
4=9.06v
5=.007v
6=7.28v
7=9.39v
8=0.007v


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PostPosted: Tue Sep 27, 2022 10:03 pm 
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Found the problem, I accidentally used a mono 1/4"jack for the input instead of a stereo one. I just swapped it out for a stereo jack, and WE HAVE WAH!!!


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