Pat I haven't thought this through all the way but I think you could use an 
auto tuner in the shack and run the coax outside and into a Ameratron 4 
position switch which switches through the coax without any other wires. 
The control would be in your shack.  I may not have thought it out enough 
but my first thoughts.  73
Ed   K7UC

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From: "Pat Byrne" <[log in to unmask]>
Sent: Sunday, July 01, 2012 9:58 AM
To: <[log in to unmask]>
Subject: Antenna Tuner

> I believe what I want exists but I haven't been able to find it yet.
> Briefly; I have two, soon to be three wire antennaes each connected
> by an approximately fifty foot length of coax, out of the shack,
> through the utility room, through the crawl space and then
> outside.  My hope is to consolidate the coaxes to one, have an
> automatic tuner just inside the PVC where the wires leave the house
> and do my tuning/switching at that point.
> It is my belief that a tuner exists that will meet my criteria.  Or
> is it just in my mind!
> Is anyone using such a beast and if so, can a total positively know
> which antenna is connected?
> Thanks a lot.
> Pat, K9JAU