All
So here is what I think I am doing. Matt is right, AllElectronics is a little more user friendly. I have selected the following
Ice Cube Relay LY2N. 12VDC, 135Ω coil. D.P.D.T. contacts rated 10A (alternatively I could go with a 162 Ohm coil)
Regulated 12Vdc 1.5A power supply and adapter to power the relays
In terms of capacitor, and this is where I would really love some help because Ohm's law and I are not good friends, the type that seems to provide the capacitance I want is Radial Electrolyic, and my choices seem to be 470 uF at 10, 16 or 25 volts, 330 uF at 50 volts. Help!
Thanks all