I would think we users are getting to a point where a good, automotive relay designed for continuous duty usage would be a good idea here. Simply use the 12v auxilliary power to feed the coil of the relay and let the contacts of the relay feed power from our 12v supplies. I don't remember the stock numbers of the parts, but we used these in an oilfield industrial application a few years ago and had VERY few failures, and when we did, they were readily available local to the unit being used. They have a multitude of mounts so they should be easy to integrate into the shack. That's the route I plan to take, that is if the relay pulls less than 500 mills, hi. 73, Don, WB5HAK
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