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[aprssig] D700 in cold weather?

Bob Gould bobg575 at yahoo.com
Mon Dec 25 10:32:41 UTC 2006


Guys,

I think that is the issue. The fans can make quite a
bit of noise and in the cold they are even louder.
Most likely you only notice the fan noise when cold.
In Maine we get the large swings in temps and when
cold you can hear the fan much easier.

Bob
n1wjo
  
--- Gary <n6lrv at cox.net> wrote:

> Hmmm... according to my info from Kenwood there is
> no temperature control
> system in the D700 instead (and like many kenwood
> mobiles) the fan is
> designed to turn on when the radio is keyed and turn
> off after a
> predetermined time has passed (probably a FET or 555
> timer or similar
> controlling this). A better idea would have been to
> position the fan to
> actually cool what gets hot instead of blowing into
> a flat surface but
> then Kenwood has done that with many radios. Unless
> your radio's fan
> actually says 'ball bearings' on it then it probably
> has bushings and
> they get noisy pretty quick. I haven't seen a
> Kenwood mobile yet come
> equipped with a fan that has ball bearings but I
> haven't seen everything
> yet.
> 73,
> Gary
> 
> Joel Maslak wrote:
> 
> > Does anyone have D700 in cold weather experiences?
> >
> > Is it normal for the fan to run in extreme cold
> (it seems to not run
> > very much, or at least not loud enough for me to
> hear, when warm).
> > My current theory is that the temperature control
> system thinks a
> > "too cold" measurement means "sensor failed" or
> some such and turns
> > up the fan all the way.  It's certainly not
> transmitting enough to
> > get warm.
> >
> > The other possibility is that I have bearings
> going out in the fan,
> > and that's why it's a bit louder.  So I'm curious
> about people's
> > experience with it in cold weather.  I'm getting
> really tempted to
> > disconnect the fan, as it's not good for it to run
> in the extreme
> > cold either way (my usual rule for electronics
> that go in the car is
> > "no moving parts" because of the temperature
> extremes - obviously the
> > D700 fails that test, and I broke my rule -
> that'll teach me!  A big
> > heat sink would have been a much better idea, like
> even the cheap
> > Alincos do).
> >
> > (for reference, "cold" is -5F and colder)
> >
> > _______________________________________________
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> > aprssig at lists.tapr.org
> >
>
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> 
> 
> 
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