inrad rx7300

Inrad RX7300 Modification While Keeping The External Tuner Jack

In Icom 7300, Panadapter by K0PIR14 Comments


Click on a photo to see a larger image

inrad rx7300

Remove all 10 screws on the top cover and 2 screws from each side.

inrad rx7300

Top cover removed. We’ll be looking at the rear of the radio.

inrad rx7300

Lift out the antenna tuner jack. Pull the cable (TMP connector) out of the jack (J1701) closest to the front of the radio and plug it into the female TMP connector.

inrad rx7300

Plug the cable from the RX7300 into the vacant J1701 jack in the radio. It is a little tough getting these into the jacks.

inrad rx7300

Slide the RX7300 mod into place. Let the external antenna tuner hang out of the rear. As a precaution use a little electrical tape to protect the wiring harness. Do not tighten down cover screws at the rear.

inrad rx7300

Finished product. I connected my LDG to the tuner port and all is well. Try this at your own risk!

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  1. Hi Rich. I just installed the RX7300 mod. Can I use the RX7300 for the receive antenna for the ICOM 7300 and also for my SDRPlay? I know I can just install the SDRPlay using the transmitting antenna, but I would prefer to use my receive antenna if possible. Does the RX7300 2nd RCA jack (the one on the right side (looking from the back) forward the receive signal coming in from the left RCA jack? Thank you. 73, Gary WD9HDM

    1. Author

      Hi Gary,

      Thanks for commenting. Steve has a diagram on his video and I think that’ll answer your question.

      You could check Steves video because he has some info on it. I hope this helps.

      Rich, K0PIR

  2. Thanks Rich! Yeah maybe just RX out for SDRPlay. And IF through USB would possibly be yet another option. So much more flexibility as compared to 7300 with Inrad RX7300 mod. Should be fun experimenting with all these ant in/out options. Love your channel, keep the videos coming! 🙂 – dan

  3. Hi Rich, I am contemplating getting the new Icom 7610. I was just reading the Manual and notice it has more TX/RX antenna connections and options than the 7300. I see two main Ant 1 and 2 connections and also a RX (in/out). One thing I wish to do is use my SDRPlay SDR RX with SDRuno as a seperate RX and panadapter with OMNIRig Control. But, with all the new flexibility of 7610 ant port options, I am not sure which ant jack to hook up the SDRPlay RX to. I am thinking it would be to the RX (out) – but there may be some other interesting options. Have you experimented with the 7610 Ant TX and RX configurations yet? PS. I am liking your channel. 73, Dan

    1. Author

      Hi Daniel,

      Nice to hear from you. No, I haven’t experimented with the RX out on the Icom 7610 yet. I think, and I could be wrong, but I think we will have to use the BNC antenna RX In and Out on the rear of the radio. Similar to the Inrad RX7300 adapter that goes on the Icom 7300.

      I could be wrong, maybe we can use just the RX out. I haven’t had the radio long enough to get to that. I am hoping the IF out thru the USB 3.0 on the rear will be of good use.

      More will be revealed. In the meantime if anyone knows, please replay to Daniels comment.

      Thanks for coming by and thank you for your comment. I appreciate it.

      Merry Christmas and 73,

      Rich, K0PIR

  4. HI RICH

    I CANT GET IT TO SHOW any where, i need to set port baud rate to set up N1MM spectrum analyser
    in his logger program i wish to use that program to display waterfall from 7300

    many thanks rich
    brian g8vpr

    1. Author

      Hi Brian,

      Nice to hear from you and I had trouble with the spectrum scope on N1MM Logger at first.

      This is my article on N1MM Logger Plus Spectrum Display:
      There is a video on it too. Did you see it? If I understand you correctly, that will help you and you can see where to set the baud rate.

      Let me know how it goes, best 73 – Rich, K0PIR

  5. nice videos bt on the 7300 how do yo get it to go to and display 11500 as the baud rate

    thanks brian..

    1. Author

      Hi Brian,

      Nice to hear from you and I’ll be happy to help. There are a few places where I set the 115,200 baud rate. Where do you see it displayed?

      Rich, K0PIR

  6. Very interesting and use-full add-on circuit hook-up for the IC7300.
    Good videos, living a clear idea of the enhanced operation of the IC7300 with SDR programs.

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