[TowerTalk] Antenna switch isolation?

[Jim McDonald]

Another commercial one is
http://www.dxengineering.com/Products.asp?ID=85&SecID=33&DeptID=17 which
claims to have port-to-port isolation of greater than 70 dB.

Jim N7US



-----Original Message-----


Some commercial antenna switches use multiple relays for improved isolation.

One relay (A) is connected to the antenna and switches between a contact on
relays B and C.

Relay (B) switches rig 1 between the relay A contact and ground.
Relay (C) switches rig 2 between the relay A contact and ground. 

http://www.microham-usa.com/Products/Antenna_Switches/double%20ten%20switch.
html