[nos-bbs] Configuring a Kenwood TM-D710 for use with JNOS?

[Michael Curry]

Bill WA7NWP wrote:

> I'd really like to hear how well that works for
> you - specially if you can give it a good workout at 9k6.


That's certainly the plan, although at the moment I'm only running at 1200.
First integration test with client stations using other D710's should be
this weekend. I'll try to remember to post a report (prompt me if I don't).

the D710 will pop out of KISS mode if it cycles power so be prepaired
> to somehow deal with that.


Good tip. I saw this mentioned in another thread as I was searching for an
answer to the original question. I'm imagining a setup in which an automated
station is constantly listening for JNOS-generated traffic (beacons if
nothing else), and if nothing is heard for some configurable amount of time,
it tries to connect. If that fails, it reaches out over the LAN and tries to
force a reload of the TNC setup script. If it can't connect after that, it
starts asserting some kind of alarm.

Or something like that. I'd be happy to hear about other approaches others
may have used to address this problem.

Clearly we will have nothing like that working really soon, but the dirty
little secret is that, in the exercise we have coming up in the next few
weeks, I'll be sitting right next to the JNOS station... :-)

I wish we had a $600 dual band radio
> (plus second tnc-x for 1200 baud) with built in 9k6 TNC back in the
> days of serious JNOS/Packet...


It's a nice radio, to be sure, but be careful what you wish for, as the
devil's in the details. One thing I've observed about the D710 -- and it
really drove me crazy until I figured out what was going on -- is that it's
extremely vulnerable to de-sense by a powerful, nearby transmitter.

While getting JNOS set up, I was using an Alinco DR-135 for the JNOS radio
and a GE MVS (two rooms away) for the Outpost client, and things were
working great. But when I substituted the D710 for the MVS in the client
role, every time it attempted to connect, JNOS/Alinco would send it back a
UA-frame that the D710 consistently wouldn't hear. When I finally guessed
what was going on and dropped the Alinco to low power, things started
working.

Likewise, when using the D710 as the JNOS radio (once I figured out how to
get it into KISS mode), and trying to use the MVS (whose power level isn't
adjustable from the front panel), again, no joy. I needed to use the Alinco
on low power as the client before things started working...

73, Michael KI6TYV
-- 
Remember, Comrades: Life is a series of choices -- all of which will be made
for you by Central Committee.
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