[arm-allstar] cdm1250 and hamvoip question

[Randy Neals]

I've used a CDM750 and CDM1250 with good success as a simplex node.
If you have the 45 Watt radio, the lowest power setting is 20 watts, and
even at that power level a CDM will get hot.
(The 25 Watts model has the capability to go to lower power levels, and has
about the same size heat sink, so I prefer to find 25 Watt models)

Do you have a time-out-timer programmed in the CDM? Is it possible that the
PTT has been asserted long enough that the CDM's timed out when it is in
this unresponsive mode that you are reporting?
Do you have a hang time? (If it's simplex, you shouldn't)

Randy
W3RWN
Seattle, WA

On Thu, Feb 13, 2020 at 10:45 AM "Jed Barton via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> Hey guys,
>
> Well, we're running it at low power, whatever the lowest power it'll
> go, i think it's 18 or so watts.
> We of course have a fan on it.
> We're doing some more investigating and we think it may be a radio
> problem.  This radio has given us a bit of a tough time from the
> beginning.  We put in another 1 we had and so far so good.
> I'll keep you all posted.
>
> Cheers,
>
> Jed
>
> On 2/12/20, "Mike Sullivan via ARM-allstar" <arm-allstar at hamvoip.org>
> wrote:
> > A little more info can be helpful. Are you running the node at max power
> or
> > at low power? What interface are you using? And as David asked, is it the
> > radio or the node you are power cycling? The CDM's and other mobiles are
> > not designed to transmit at max power for very long, they are usually 50%
> > or 33% duty cycle radios. It's possible the radio is freezing up to
> prevent
> > itself from being damaged, or it's shutting down due to overheating or
> high
> > SWR. If it's the node, I had an issue at one point where our RIM-Lite
> would
> > lose connection and periodically needed rebooted, which came down to a
> > faulty USB cable.
> >
> > A little more information on your setup will be of more assistance.
> >
> > Mike
> >
> > On Wed, Feb 12, 2020 at 9:02 PM "Jed Barton via ARM-allstar" <
> > arm-allstar at hamvoip.org> wrote:
> >
> >> Hey guys,
> >>
> >> OK, interesting issue that i'd like some input on.
> >> So we're running an allstar node with hamvoip of course.  We have a
> >> cdm1250 hooked up to it. This has happened several times, where for
> >> some reason, the radio just stops transmitting.
> >> When my friend got to the site with the node radio, the radio was
> >> powered on as normal.  He power cycled the node radio, and then it
> >> started working again.  This has happened several times.  It almost
> >> seems like the node radio is getting thrown in to orbit or something,
> >> cause it'll transmit for a long time perfectly, then just quit, and
> >> all it needs is a power cycle.
> >> Any thoughts or ideas, anyone seen this?
> >>
> >> Cheers,
> >>
> >> Jed
> >> _______________________________________________
> >>
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> >> ARM-allstar at hamvoip.org
> >> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> >>
> >> Visit the BBB and RPi2/3/4 web page - http://hamvoip.org
> >>
> > _______________________________________________
> >
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> >
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> >
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>