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

[Brett Howard]

I went to radio shack and got the relay I needed.  I then built a box
that will pass 10A to several RCA connectors (I wanted to be able to
plug the units plugged into the box into the K3 when portable with a sub
set of my goodies).  Anyway I then also got a few of the cheapy cores
that Radio Shack has there.  I put an LC filter on each port just for
fun...  I figured if I was making it it only takes a short bit of time
to put some RF filtering on each port...  I also stuck a couple big bulk
caps in there just for grins.  Then an LED to signify that its on too
(why not...).  Finally installed a suitable cord with an APP on it to
supply the 10A of power.  All in all its a useful little box and every
piece of it can be had at Radio Shack still today.

~Brett  

On Sat, 2010-08-21 at 12:09 -0500, Don Cunningham wrote:
> 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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