Wah v846 build problems

Frequent questions about dead or faulty pedals. Whether you repair, mod or build pedals, debugging is important. Threads about general debugging problems irrespective of the circuit involved...
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HHR18
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Post by HHR18 »

I just finished my own Vox v486 using a Pigeon FX PCB but the wah doesn't seem to work. When I press down on the pedal I only get more treble and volume. It doesn't wah. I'm reading that this could be due to a an open inductor. The one I build has a Sabbadius inductor but my when using my old dunlop inductor (from a crybaby) I have the same problem. What else can be going on here? Any help would be greatly appreciated!
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CHEEZOR
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Post by CHEEZOR »

Check that electrolytic capacitor. If its not good or reversed polarity, then that could probably cause those problems.

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Post by HHR18 »

Still haven't got it working. Here is a short audio clip showing my problem. First is the clean sound then I'm slowly turning the pot (by hand). The wah goes from very low volume to more trebly. I checked the inductor and it shows a resistance of about 25 ohms so that seem to be working. Any help would be greatly appreciated!
http://dl.dropbox.com/u/137602/sd.wav

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Here are some additional photos! I can't for the life of me figure out what's going on! Another strange thing is, is that one of the transistors has all pins with a voltage of about 8, while the other has normal voltages! Could this be a ground problem?
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Post by HHR18 »

SOLVED!! Had Q1 in the wrong pin configuration!

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Post by CHEEZOR »

Thanks for posting the solution! This may help others in the future. :)

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