[Elecraft] [K3][P3] 6m Preamp and P3 on AUX Pwr

[Don Cunningham]

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