HI, i've tried to built the Q.tune,
it doesn't tune, the tuning screeen stay in - posizion, if i press the footswitch it mutes and lets the signal pass,
i've measured the voltage and i have those:
1. 9V on Pin 8 of each NE555 (IC3 & IC4). i have 8,78v
2. 5V on Pin 8 of MCP6002 (IC2) i...