wired up a guitar synth circuit this afternoon and was surprised to find that it burned through not 1, not 2, but 3 power supplies all within about an hour of eachother trying to get it powered up. these supplies were brand new so i do not think that its an issue regarding faulty units but with the circuit itself. i made in error in the circuit itself which i have to go back and troubleshoot but im suspect that even that error could cause a failure in whatever power supply is plugged into it. i'm using the exact power supply that is suggested. does anyone have any idea as to where to start troubleshooting such an issue? i dont have a schem of the circuit to put up for reference so any input is appreciated, general or precise. thanks again folks.