[TowerTalk] box for RX antennas

[Jorge Diez - CX6VM]

Hello,
 
I am looking for a schematic for a box to connect up to 3 RX antennas and
the TX antenna.
 
So I can select to chosse one of the 4 antennas to RX, while I transmit on
the TX antennas.
 
Is to use with a radio that allows connection of RX antenna, like FT1000, K3
or a modify TS850.
 
I want to do something good, with all the protections necesaries to protect
amplifier and radio, and beverages transformers.
 
Thanks in advance
 
73,
Jorge
CX6VM/CW5W