Had a guy ask me to make his Vox wah true bypass and add a power jack. No problem I told him. (I've done several TB mods on Crybabies and the circuits are very close). I found a good resource for the wiring and proceeded. I chose to wire the switch using Madbeans Standard Wiring Diagram because it is what I'm used to rather than the one in other diagram. I assumed that is where I made the mistake but after reviewing it multiple times I'm just not seeing it.
Basically, true bypass works and when I engage it, it squeals like a pig!! I'm including photos and video. Would appreciate a second/third... Pair of eyes.
(Instead of the 'Brown' wire I used white-all I had on hand).
(http://tapatalk.imageshack.com/v2/14/11/04/492599db036e4f4bda10819fe75c1f18.jpg)(http://tapatalk.imageshack.com/v2/14/11/04/480011361253fc8c56e154c35b12b4f3.jpg)
Pictured below is the Madbean version of the switching diagram (I put my dashes the wrong direction;)
(http://tapatalk.imageshack.com/v2/14/11/04/eb789079ba1ee98063c1139942f48a13.jpg)
Here is the diagram for the mod itself. I have not messed with any of the power wiring yet.
(http://tapatalk.imageshack.com/v2/14/11/04/d514f9df538bf0188a120261b12d20a6.jpg)
Also, beneath the squeal, it sounds like I can hear a faint guitar signal. Can't be for sure though because it's so loud!
https://vimeo.com/110894886 (https://vimeo.com/110894886)
Dog finds it intersting:
https://vimeo.com/110894955 (https://vimeo.com/110894955)
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Hi PhiloB, I think that you just need to swamp input and output jack wires and you will solve those whale tones :)
If this is correct try to connect wah in backwords (guitar-wah out-wah in-amp) and it should work normally.
Cheers
Brane
Boy I hope that's all it is. Unfortunately I'll have to wait till tonight to find out.
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Ok. So I had the guitar plugged into the output and the amp plugged into the input. {hanging head in shame}. Works perfectly! Now to wire up the power jack:)
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:D (Y)