Topband: Single antenna port xcvr but want to employ separatereceive antenna

[Tom W8JI]

I am nervous as well, Tom...hi Hi
I'm really thinking of employing a separate relay that I control with a 
simple switch, vice depending on the rig to switch "correctly"
using a simple switch is antiquated and slow but....for certain I can 
control the switch over mo betta AND prevent damage to the low noise 
amplifier...>>>>

Everything else pales compared to sequencing.

For example, grounding unused ports is commonly thought to decrease unwanted 
coupling. Grounding to improve things assumes unwanted coupling is 
capacitive, and assumes there are no ground loops.

Having measured many dozens of switches, grounding does not mean less signal 
on unwanted ports. This is particularly true if the chassis or board has 
poor groundplane or wiring.

You'd be surprised how many commercial switches are actually worse because 
they ground unused contacts. :-)

73 Tom