[Icom] Using IC-745 Receiver Output Terminal

[Marsh Parker]

Gary,
I have an Icom 751A transceiver and an RX-320 as well.  The 751A also 
has the RCA jumper for the same purpose.  Yes you can do what you want 
but then you have two 50 ohm receiver inputs in parallel.  Might cause a 
bit of loss of sensitivity.  I have built the active antenna described 
in QST and then built up a small switch that allows a choice of 6 
antennas between two receivers.. The 751A and the RX-320.  With both 
switches on the same antenna, It would be the same as yourY connector. 
 There should be no problem when you transmit with this scheme. That 
jumper has no xmit RF on it.

I also bought a 746PRO which does not have the RCA jumpers 
unfortunately.  I have blown out the Mixer fets in the RX-320 twice!  I 
then built a relay box which disconnects the RX-320 antenna and grounds 
it when I go into transmit...Oh well, nice to have the ability for the 
seperate receive antennas.

Good luck & 73,
Marsh, NC7V

Gary Jacek wrote:

>I want to use a TenTec RX-320 as a dual watch receiver in
>conjunction with my IC-745.
>They will both be connected to the same antenna.
>
>When the IC-745 switches from receive to transmit, I need a way
>to prevent
>the 745 RF from entering the RX-320.
>
>In the 745 manual, I note that there is a Receiver Antenna
>Output Terminal
>and a Receiver Input Terminal on the back of the 745 and that
>these are
>jumpered together with a small RCA-RCA cable.
>
>Can I simply replace the jumper with an RCA Y connector and
>route the third connection
>to the antenna input of the RX-320?
>
>Is there any danger of transmit RF getting into the RX-320 if I
>do this?
>
>Gary
>VE7GGJ
>
>
>
>
>
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