Blue magic problem. Need Help!!!!

[Cecil]

Just finished the blue magic pedal. Purchased the board from ggg populated as layout and schematic, checked all connections set the voltage drain, 4.7. But the pedal does not work. Bypass works using a 3pdt sw. I am at a loss this is my third pedal i have yet to have one work the first try. Very Frustrating. Please Help!!!!!

[Ge_Whiz]

Please tell us more.

"Doesn't work" = no sound, OR
"Doesn't work" = unaffected sound, quiet sound, hiss, whistling sound etc. etc.

[Ed G.]

I'd check on the first mosfet, make sure it isn't fried. Those things can be touchy.

[Cecil]

Doesn't make any sound when switched on turn knobes and no change. no hiss no nothing. BTW Thanks to all For the Help.

[Cecil]

Is there any way to check the mosfet? Thanks Cecil

[petemoore]

Since it's probably plugged into an amp, see how far the signal gets from the output, by touching your thumb to a piece of metal and use that as input...connect yourself to the output jack hot...hear the hum.
 Then try that at the output lug of the switch, then the circuit output to the switch [hit the switch or degub till your hear the thumbuzz again]...then try the other side of the DC blocking cap...the buzz tone may be slightly attenuated in the bass content.
  Follow the signal path to a source or collector { I forget which this has as last actives output]
 Source Buzz...try the Gate, if the transistor is biased [turned on] you'll hear the buzz there too [altered very slightly]
 Collector buzz....try the base, most of the time collectors are used for transistors to amplify...at the base the buzz should sound gainier/louder.
 Keep going till you find where the sound is lost, if it's in a passive section, there's a miswire, in an active component, check the bias, try another active, look for miswires near there.
 If you want a different input than your thumb [actually I find it's very 'handy' quick and effective, would be written of except it's an extremely bad practice in high voltage circuits..connect cable ground to ground, use the hot as your input probe...then use a guitar and strum it, or an old minikeyboard, with one of the keys taped down, or your effect that had that oscillation problem [just kidding], or make an oscillator and use it as a signal generator, or use an Uglyface...that's another day though...
 After all that...you may find the problem was in the switch wiring...use DMM beep mode to see what's grounded and what the switch is ['nt?] doing.
 I'm always so anxious to try the circuit, and expecting debugging and tweaking, I built a jig...bottom box metal with jacks in it/top box cardboard with 3 alligator clipped wires coming from  in hot, out hot, and ground...
 I take the switch/jack problem free board [just the board and nothing but the offboard pots and battery connection clip], and test the circtuit proper before adding those items possible problems to the mix.