Hello, I'm new here.
I have achieved this Mistress Flanger clone, it worked fine for a couple of hours, and then, only dry signal is coming out !
I have tried to re-biais and recalibrate it but, only the dry signal comes out !
I 've checked all voltages and compared to voltage list: all IC are OK except MN3207 Pin 4 (not MN3007) :
Pin 1 0 V
Pin 2 4,2 V
Pin 3 4,8 V
Pin 4 -0,23 V (negative) !!!??? Should be about 45 mV
Pin 5 8,7 V
Pin 6 4,25 V
Pin 7 4,85 V
Pin 8 4,85 V
I have checked for shorts, chop sticked all components, found no cracklings.
I have swaped all IC's with new ones, Q1 , Q2, changed MN3207 Coolaudio : Still dry signal comes out.
With a probe, I have dry guitar signal entering MN3207 Pin 3 but, no guitar signal comes out from pin 7 and 8.
With probe, found a clock signal on LM324 pin 1, 3 and 14.
With osciloscope, I found a square wave circa 20 Khz on pin 7 and 8 MN3207.
I can't understand why I have a negative voltage on MN3207 pin 4 : could it be a C5 faulty ? Other .. ?
I have no experience with clock pedals.
Thanks for help.
I have achieved this Mistress Flanger clone, it worked fine for a couple of hours, and then, only dry signal is coming out !
I have tried to re-biais and recalibrate it but, only the dry signal comes out !
I 've checked all voltages and compared to voltage list: all IC are OK except MN3207 Pin 4 (not MN3007) :
Pin 1 0 V
Pin 2 4,2 V
Pin 3 4,8 V
Pin 4 -0,23 V (negative) !!!??? Should be about 45 mV
Pin 5 8,7 V
Pin 6 4,25 V
Pin 7 4,85 V
Pin 8 4,85 V
I have checked for shorts, chop sticked all components, found no cracklings.
I have swaped all IC's with new ones, Q1 , Q2, changed MN3207 Coolaudio : Still dry signal comes out.
With a probe, I have dry guitar signal entering MN3207 Pin 3 but, no guitar signal comes out from pin 7 and 8.
With probe, found a clock signal on LM324 pin 1, 3 and 14.
With osciloscope, I found a square wave circa 20 Khz on pin 7 and 8 MN3207.
I can't understand why I have a negative voltage on MN3207 pin 4 : could it be a C5 faulty ? Other .. ?
I have no experience with clock pedals.
Thanks for help.
Attachments
Last edited: