[Elecraft] P3 Temperature Specs

[Alan Bloom]

The "operating ambient temperature" spec for the display used in the P3
is -20 to +70 deg C (-4 to +158 deg F).

Is the problem in the P3 or the K3?  If you let the K3 warm up for a
long time then does it work right away when the P3 is turned on?  And
vice versa, if you let the P3 warm up first, does it work as soon as the
K3 is turned on?

Alan N1AL


On Mon, 2011-01-31 at 13:02 -0800, Ron D'Eau Claire wrote:
> Most LCDs will freeze and self-destruct by cracking the screen, although
> that normally takes temperatures below zero F. However, most of them are
> specified to work properly only at much warmer temperatures - between about
> 50F and perhaps 100F. Also, many manufacturers recommend allowing the LCD to
> warm up naturally before applying power if they have been stored at very low
> temperatures. 
> 
> Ron AC7AC
> 
> 
> 
> -----Original Message-----
> 
> Not sure what Elecraft uses in the P3, but many LCD displays are only 
> rated down to zero degrees C .... 32 degrees F.
> 
> Dave   AB7E
> 
> 
> 
> On 1/31/2011 11:38 AM, David Yarnes wrote:
> > Hi all,
> >
> > I recently set up my K3/P3 combination on my workbench in my garage in
> order
> > to do some rig comparisons, etc.  The garage is not insulated, and here in
> > the desert it can get pretty chilly at night.  Several nights have been
> > slightly below freezing outside, and inside the garage it can get down
> into
> > the mid 30's, or slightly higher.
> >
> > Anyway, I began noticing, on these colder nights, that my P3 didn't want
> to
> > "wake up" for a while.  It would just show "0" for operating frequency,
> and
> > the display was not effective.  Cycling the P3 on and off didn't seem to
> > accomplish anything, at least for a while.  Eventually it would wake up,
> > presumably after just a little internal heat was generated.  I'm pretty
> sure
> > this is just a temperature thing, since I never have the problem if
> > temperatures are more reasonable.  I looked on the Elecraft website, but
> > didn't find any "specs" for operating temperature.  I'm just wondering if
> > these were ever evaluated.  The K3 doesn't seem to have a problem--just
> the
> > P3.
> >
> > Dave W7AQK
> >