I wouldn't trust an RF-sensed switch to do the job (have never seen one
anyway). The antenna jack on the rig that is NOT to be used would have to be
grounded first before allowing the primary rig to transmit. A bit of a
dilemma. You can use a manual coax switch (which grounds the unselected
outputs), but even then quite a bit of signal is coupled to the transceiver
who's connection is grounded. I tested this setup on HF, bringing the power
up slowly on the selected rig and tuning the unselected rig to the same
frequency. On 10 meters, the signal present on the unselected rig's input
was enough to cause a 45 dB over S9 signal. Not enough to damage the
frontend in this case, but you'd need to test the switch you're planning to
use to see what results you get.

K8AC


"Chuck W." wrote in message
oups.com...
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?

What would be great is if there was a switch that would share the line
between the 2 transceivers when no outgoing RF is present, and switch
everything to one rig when RF is sensed. However, I haven't seen a
product that does this!

thanks for any thoughts,

73,

Chuck
KB5GC