Re: TM-271a Fails to Transmit

Ron Short

Bought it from Les at  HamMadeParts.





From: <> On Behalf Of Tyler Griffiths via
Sent: Friday, November 11, 2022 8:10 AM
Subject: Re: [Kenwood-APRS-radios] TM-271a Fails to Transmit


Did you build the cable or buy it?


Tyler Griffiths

See where I am:



On Fri, Nov 11, 2022 at 8:56 AM Ron Short <ron@...> wrote:


My APRS station consists of a KPC3+ and at Kenwood TM-271a radio. Yes, the TM-271a is not the “e” model. The cable from the KOC3+ plugs into the mic on the front panel and speaker jack in the back. 

When APRS transmits, the TNC Tx light turns on, but the TM-271a does not key up. The TM-271a baud is set at 1200.

reading through the manual, I do not see a setting I missed.

Thanks for any help on this.


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