[Elecraft] Connections to K3 ant 1 & 2

[N3XX]

Hi to all on the list,

I just finished building my K3 kit a few weeks ago (4175).  All went well, 
and the new xcvr is up & running with no problems.
The antenna setup at my qth is a single cable from the entrance panel at the 
house going out to tower #1, through a remote antenna switch to select from 
antennas on that tower or another connection going to tower #2.  At tower #2 
is another remote antenna switch to select various antennas on that tower. 
In the shack I have an amp for 160-10 meters, and an amp for 6 meters.
I would like to connect my single cable coming in from the entrance panel to 
a 2 way coax switch,  with one of the ports going to my 160-10 meter amp, 
and the other going to my 6 meter amp.  Then the 160-10 amp would be 
connected to the K3 antenna connector 1, and the 6 meter amp would be 
connected to K3 antenna connector 2.
Both amps will operate at the legal limit easily, and my concern is that 
when xmitting through one of the antenna connectors & amp, I will put too 
much rf back through the coax switch to the unused K3 antenna connector, and 
possibly damage the K3.
I have been changing cabling manually but would really like to be able to 
just operate a switch to make the change.
So, if anyone on the list doing something similar to what I have in mind, I 
sure would like to hear about your setup, what kind of switch you are using, 
how much port to port isolation is necessary to be safe, etc.

Tnx & 73,
Tim - N3XX