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

First of all Thank you for your reply Gbart!!! And I am all about DYI projects but am having some troubles finding some of the parts described above? I think I may have found something that will work for the relays but would like to run it past you to double check my findings...

Here is the 12VDC coils I found:

http://www.rvparts.com/product-12-100530

http://www.spadepot.com/shop/Relay-DPDT-30A-12VDC-Coil--P8366C233.aspx

As far as the RC snubber or reverse-biased diode I could not seem to find a single site that had anything describing these parts. The wall wart which I'm sure I already have one that will work. Please let me know where I might look for the RC snubber or reverse-biased diode and if the listed above relays will work? Thanks again for your help!

Mello

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.