Icom IC-7300 RX Antenna mod

I like this transceiver, good receiver, fantastic DSP filtering and NR, excellent GUI and many goodies like the automatic record of QSOs triggered by ptt/key or the RS-BA1 software that shows the waterfall on the PC screen (it works ok also in Linux wine).

Probably Icom has decided to limit some capability of this model for market reasons. The IC-7300 has only one TXRX antenna connector and no RX input, but it’s easy to add a connector on the back and, inside, there is enough room to place a coax relay.

The relay can be mounted on a shaped aluminium bracket fixed to the transceiver by two screws that fix the RF-UNIT board to the chassis.

The adapter has been made with a female TMP connector and a SMA-M to SMA-F transition (used as a wear protection for the connectors of the instruments).

The external ATU supply connector can be moved away, like on the IC-756, and replaced by two pieces of copper pcb board that holds the switch and the coaxial connector.
The orange wire of the ATU is used to energize the relay.

This mod is fully reversible and the transceiver can return in his original status in few minutes.

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Now the IC-7300 can be used also as a second receiver for the 6m or for monitoring the IF of the FT-817, connected to the 3cm transverter.


4 Responses to “Icom IC-7300 RX Antenna mod”

  1. Where can I get one of the TMP jacks?

  2. I came across your website and noticed you were running RS-BA1 under wine. I just recently built a Linux box that I’m using for ham radio (Ubuntu Bionic). I’ve installed RS-BA1 under wine (winehq) but I have no idea how to manage USB/COM ports. I was hoping for a GUI to manage them, but haven’t found anything yet.

    Do you have any suggestions on a GUI or instructions on how to get the COM ports and Audio working for RS-BA1 under wine?

    Any help would greatly be appreciated.

    Norm – W7CK

    • I wrote this post when I was running Ubuntu Trusty, now I’m on Bionic and I haven’t tried to install RS-BA1. Anyway in order to have the comports usable by wine you have to do two things: 1 – add your user to the group “dialout”. 2 – make a symlink from your usb serial port(s) (usually /dev/ttyUSB0 /dev/ttyUSB1 etc.) to your wine folder (usually /home/youruser/.wine/dosdevices/) with a command like “ln -s /dev/ttyUSB0 ~/.wine/dosdevices/com1”
      Hope this helps, 73s

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