Hi there!

I recently built an effect (on stripboard) from a schematic i found in a book, but it dosnt work, when the effect is on the light lights up but it dosnt affect the sound at all , the volume control can make it quieter though. Any ideas?  It uses 2 germaium diodes for the clipping stage.

If you can provide a schmatic, or a description...
 It sounds like it has opamp in it?
 If so, take voltage readings from all the OA pins to ground.
 The debugging page has good debugging advice.
 I use my thumb connected to a probe as a signal injector, and work my way < from the output, injecting 'thumb buzz' for signal testing, as a source, tracking where signal gets 'lost' in the circuit.

Hi again

Here is the stripboard layout for the effect, NOTE: VR1 has been replaced with a normal pot, S1 has been changed to a DPDT and has had a led added and i have added a main power led in parallel with S2.



http://www.angelfire.com/music5/axeman/distortion.jpg

Where connections are made on that one.
 Looks like i'ts a DIST +?
 Do your clipping diodes connect ground and output of the OA?
 Take Voltage readings from all the OA pins to groung and post 'em.
 If pin 7 goes to 9V [Aka single op amp]...
 The 3 'signal' [-in, +in and output] ] pins should be at around 1/2v of supply [or ~4.5v of 9V].

Sorry i cant do that as i have no meter, could a faulty op-amp or diode cause this problem? (i dont know that much about electronics) :?: