Hello DIYers, this is a cheap 20A(fused) remote turn-ON/OFF power-strip/surge protector that has been made from an old UPS chassis, a 30A 3-pole contactor(24VAC coil) and some salvaged parts, it was first a push-button manual turn-ON with the 3rd pole uses as auxiliary contact then later modified, so the front power button now acts as a momentary test and the rear switch disables the unit, also the 3 leds has been assigned to disabled, ready and power-ON/OFF status.
The remote circuit module uses a common 2N2222A transistor and a SPDT 12v relay and can be used with most A/V equipment with a trigger voltage from 5~15vdc, for more details about the simple circuit, I've posted HERE the basic schematic with part numbers as well.
Currently using it to auto turn-ON/OFF two Samson S2000 amplifier and a Driverack PA2 with my PT-100 preamp with great results so far.
Very good 'repurposing'. And at minimal $$$, which is important.
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Hello, sorry for the late reply and thanks for the kind words.
As an update, the last modifications I've made to the unit was the addition of a time delay module with just few secs on-make for amplifiers protection against quick power flickers, also changed the funny looking RCA with the original RJ45 connectors PCB using pin 1 and 2 for the REM in/out.
Here are the shots including the basic 2N2222A switching schematic: