[Elecraft] Antenna switching [K3]

[Mike Scott]

I put up a vertical yesterday to begin playing with diversity mode.

When I installed the sub receiver I opted to connect the Aux RF BNC
connector. Now I am not sure I made the right decision for me as I want to
be able to easily switch transmit and receive antennas. Of course then my
20M dipole and my 6 M vertical would be just sitting there unconnected and
to switch bands I have to plug new cables in. I have more antennas planned
for the future and I may try some kind of low noise receive-only antenna.

In the old days a simple antenna switch would be all I need but now I have
multiple simultaneous antennas to switch and I need to make sure I don't
transmit out of Antenna 1 into the Aux Rx port ;-)

So now I am considering building some kind of well isolated Antenna switch
matrix. I am interested in what others are doing. If I use relays, how does
one build for good cross-talk isolation between antennas? Maybe all I need
is two or three simple antenna switches.

Mike Scott - AE6WA
Tarzana, CA (DM04 / near LA)
K3-100 #508/ KX1  #1311