> My second question, was on wiring a Garmin stack to an avionics
> master switch purchased from Lancair. The rocker switch is rated
> at 15 amps, needless to say the radio stack runs allitle over
> the switch's capacity. I guess I'll have to use a 30 AMP relay
> for the switching. Any info. on finding the correct relay to use,
> wiring insights, schematics, ect. . . would be appreciated.

Keep it simple, use a 30 Amp switch...

$3.66 at Digikey for the illuminated (green LED), SPST, 30A, 12V
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=67-1914-ND
http://www.lumex.com/pdf/CLS-RO11A12250G.pdf
Many others in varying specifications. You probably want at least a 30V
rating. This one is only 12V.


If you must use a relay, consider a solid state switch instead.
http://www.irf.com/product-info/datasheets/data/irf1324s-7ppbf.pdf
Smaller, lighter, cheaper, more reliable (if mounted properly), no flyback
voltages, 300+ amp rating. With careful design, you could even
use these to replace the main contactor and starter relays -- again in a
12V system. Other similar parts would be suitable at higher voltages.