Turns-off your amplifier when idle for 15 minutes Fed by amplifier tape-output Circuit diagram: Parts: R1,R8 1K 1/4W Resistors R2,R3 4K7 1/4W Resistors R4 22K 1/4W Resistor R5 4M7 1/4W Resistor R6,R9 10K 1/4W Resistors R7 1M5 1/4W Resistor R10 100K ...