12 Volt trigger for Krell KSA amplifier.....

All of the parts you need can be obtained from Digi-Key. YMake sure that you connect the diode properly -- i.e., cathode to the positive output side of the wall wart.

30A 120V DPDT relay:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=Z269-ND

0.1uf 275V X rated cap:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=399-5426-ND

100 ohm 1/2 watt resistor:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=100H-ND

1N4007 diode:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=1N4007DICT-ND

On second thought, you really don't need a DPDT relay. SPST will work as you only need to switch the hot line. If you go with a DPDT relay, you will need to put a cap and resistor across each set of contacts.

SPST relay:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=Z261-ND

Wow thanks a ton Gbart!! I really appreciate your help with this one! But I have one more question that I would like to double check, this assembly that I put together will replace the power switch that is currently on the amplifier or does this connect in elsewhere? Thanks again!

Mello

You will need to wire the assembly to a 20A single outlet with the relay on the hot line and plug the amp into that outlet. It occurred to me that before you go buying the parts for this project, the type of power switch on the amp will determine whether or not it can work. Is the power switch a maintained or momentary pushbutton type ? If it is momentary, then you're wasting your time, since to turn the amp on remotely, the power switch will need to be in the on position at all times.

The switch on the front of the amp is some type of relay switch. ( not sure what type exactly it is so I will explain it's behavior) As it sits right now, I currently have it on a switched outlet and when I turn on the switch to give the outlet power you still have to push the power button on the amplifier for it to come on. Then if I turn the outlet off with the switch it then obviously looses power and turns the amp off and if turned back on you will still have to hit the power button to get the amp to turn on. (sorry for the long explanation) So I am thinking that this is a normally open momentary switch that actuates a relay of some kink? Let me know your thoughts? Also I will be running a dedicated circuit for this amp in the near future that will not have a switch so the wall switch will not be an issue in the future. Thanks again man!!!