[Elecraft] Cold K3

[Fred Jensen]

On 10/6/2016 2:03 PM, Richard Fjeld wrote:
> Fred,
> What is the typical winter temp when the radio works, but no display?

Guesstimating here ... our highs are currently in the high 60's/low 70's 
[in the sun] and lows are running in the low 40's/high 30's [all degrees 
F, we're going metric inch by inch].  The display lit up just fine at 
0530 local last Sat when it might have been 38-40 or so in the truck. 
Last winter, lows were in the low teens, highs in the low 30's, and the 
display would take 4-5 minutes to brighten up.
>
> Also, you mentioned crystals not oscillating at cold temps.  That may
> have been happening in the past when I thought it was due to low gain in
> the oscillator circuits.

Could be.  In Alaska, the luggable Motorola non-tac VHF radios sometimes 
would fail to work if they weren't warm.  A hair blower on the crystals 
would usually resurrect them.  Once the radio was in use, they seemed tp 
perk along fine ... until my troopers set them down on the ground and 
froze the batteries. :-)

73,

Fred K6DGW
- Sparks NV DM09dn

- Northern California Contest Club
- CU in the Cal QSO Party 7-8 Oct 2017
- www.cqp.org