Hi Chuck

In the commercial world usually a circulator is used. It is in fact
quite common as the cost of setting up another tower sited antenna is
very high.

The big problem with sensing RF is that you are reacting to its
presence. Be better to run it from the PTT cct of the TX. I have seen
some build it yourself articles for high power PIN diode switches out
there. I dont have any URLs but the one I remember was on the LINRAD
site - or just do a google on "high power PIN".

Cheers Bob VK2YQA

Chuck W. wrote:
I'm wondering what is the best practice for connecting two transceivers
to a single transmission line/antenna, or even if it is advisable to
do?