As we are aware, the TM-D710A has packet/APRS modem built in the head unit, but the chipset used for it has a limited payload so you end up breaking messages into smaller chunks.
I would recommend using the TM-D710A (and the TM-V71A - same radio body) in the traditional packet setup. Connect a soundcard to the Data jack and a serial port to the PC jack. Set the data band to A or B (Preference) and then turn on EchoLink Sysop mode. Then when you assert RTS on the serial port it will key the transmitter of the selected Data Band. For APRS you'll need a TNC like direwolf to encode and decode the modem tones.
The beauty of this setup is you all ready to use the same radio for other modes like FSQ, MultiFSK, SSTV, etc., with fldigi etc.
Danny
K5CG
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----- Original Message -----
From: "Andrew P." <andrewemt@...>
To: "yaac-users" <[email protected]>
Sent: Sunday, January 16, 2022 6:13:24 PM
Subject: Re: [yaac-users] Yacc won't transmit with Kenwood TM-D710
Well, there are a couple of possibilities.
1. Kenwood radios require RS232 modem control signals (DTR, DSR, etc.). However,
in cheap USB-to-serial adapters, these are often omitted as excess circuitry.
You may want to get an RS232 line monitor to connect between your adapter and
the Kenwood PG-5H cable to confirm the DTR and RTS signals are coming out of
your adapter. The below link shows an inexpensive device that I have found to
work well:
2. What port type are you using in YAAC to talk to the Kenwood, and what mode is
your D710 in (APRS or PACKET)? The Kenwood port type in YAAC corresponds to the
APRS mode in the D710, which DOES NOT permit transmitting from an external
computer (only from the D710 control head itself). The Serial_TNC port type in
YAAC corresponds to the PACKET mode of the D710, which means you lose the
pretty APRS packet display in the D710 and all of its beaconing abilities, but
gain the ability to transmit from the computer (assuming you enabled
transmitting in the Serial_TNC configuration panel). YAAC also has a Radio View
window which provides most of the display information of the D710 control head.
Hope this helps.
Andrew, KA2DDO
author of YAAC
________________________________________
From: [email protected] <[email protected]> on behalf of Chris Hansen
<hansencj@...>
Sent: Sunday, January 16, 2022 6:50 PM
To: [email protected]
Subject: [yaac-users] Yacc won't transmit with Kenwood TM-D710
I'm trying to run Yacc on Windows 10 with a Kenwood TM-D710. I am using a USB
to serial port. I can receive fine, but it won't transmit beacons or messages.
Any suggestions?
Thanks.
Chris W6COV
Danny K5CG