Just purchased a Marantz AV-550 tuner/preamp and love it! Trouble is, I want to be able to turn on my amplifier (not marantz--a parasound 806) with the 'remote control output' but can't figure out what kind of switch/relay to use. The 'output' sends a very small surge of DC voltage (approximately .3 volts) at turn-on and again at turn-off. Any ideas or suggestions????