I have been able to determine several serial commands for the
Kenwood TM-71A. They are probably very similar to those for the
TMV71 duel-bander.

	Is there a list anywhere of all the remote commands that
one can send to this transceiver?

	So far, I know that FQ followed by a carriage return
outputs the current VFO frequency. SR is a system reset and sets
everything back to factory defaults. I discovered that by
accident and had to put everything back so don't do that one
unless you really mean it.

	What I still do not know is what command to use to
directly enter the frequency and CTCSS tones in to a given
channel. the command MR will tell you what channel you are
currently on but again, I was not able to set, say, channel 17
to 145.35 with a PL tone of 107.2 HZ or more likely, 14 which is
the index number for that particular analog CTCSS tone.

	If you use a computer equipped with a serial terminal
program such as c-kermit, you should set the line speed to 9600
baud. My serial port was set to 8 data bits, 1 stop bit and no
parity and it works fine.

	One thing somebody could do is sniff the serial traffic
between one of the Windows programs that will remotely run the
TM-71 and the radio. Program a channel, for instance and see
what the computer and radio sent to each other.

	Sending the TX command causes the rig to begin
transmitting. The serial cable plugs in to the same RJ45 jack as
the microphone so if you just have your computer hooked up, all
you will do is send an unmodulated carrier. RX switches back to
receive.

	I am sure those commands work with packet or such things
as PSK31 in which the computer feeds audio in to the
transceiver.

	In my case, I sent TX and then noticed I had the
repeater keyed up so I sent RX quickly to stop being a nuisance.

	I've had this radio for around 4 years and am trying to
write my own programming software for the Linux command line. I
think it is going to be relatively easy but so far, I haven't
found any list of commands so have been basically learning by
trial and error.

	By the way, the rig still works after all my
experiments.

	Thank you for any information.

Martin WB5AGZ