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ICOM Land Mobile Radio - Discussion forum for ICOM land mobile radio equipment such as the IC-F series radios. Please do not post amateur radio topics here.

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Old 09-19-2017, 11:05 PM
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Default IC-F121 w/OPC617 for APRS or TNC

Has anyone tried using an Icom F-121 with the OPC 617 serial adapter for APRS or TNC use?
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Old 09-20-2017, 9:10 AM
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The OPC-617 is not a serial adapter. It's an option cable that gives you external access to some of the pins inside the radio.

I have an Icom IC-F1020 that I have used for packet and APRS while connected to an external TNC. The F1020 uses the same OPC-617 cable that the F121 uses.

Attached is the pin-out of the OPC-617 from the IC-F1020 manual. Just match the pins in the OPC-617 to the radio port pins on your TNC.
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Old 05-18-2018, 2:15 PM
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I have a didgipeater set up with a Icom f-121S. I had to get a cable that used the mic jack and the speaker jack. I got one from Associated Radio Communications CAB K101 Now that is for a Kantroniics KPC-3. It is in service here at a local hospital.
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