[Elecraft] K3 RTC accuracy

[Alan Bloom]

Wow, a second per minute is 16,667 ppm error.  That can't be due to the
accuracy of the 32 kHz resonator - there's no way it could be off that
much.  It sounds like a programming error where it's counting the
seconds incorrectly, but I doubt that could be the problem since it
would have shown up before this.

> If I shut the rig off
> and re-power it, jumps to some goofy time and date. Today the
> date shows up as 19.36.41 and the time jumped 3 hours and 40 min.
> ahead of where it was set when I cycled the power.

Sounds like the 3V battery is dead or disconnected.  I would check the
power to the real-time clock chip (U16 pin 8 on the front panel board)
while flexing the board and see if perhaps it's intermittent.  Do that
both with and without power turned on.  You shound measure almost 5V
with power on and 3V with power off.

Al N1AL


On Thu, 2008-01-24 at 03:53, Arnie Grubbs wrote:
> Hello,  I was wondering if anyone has noticed the accuracy of the
> real time clock in their K3?
> 
> Mine seems to be loosing about 1 sec. for every min. that goes by
> as compared to WWV on 2.5 Mhz if left on.  If I shut the rig off
> and re-power it, jumps to some goofy time and date. Today the
> date shows up as 19.36.41 and the time jumped 3 hours and 40 min.
> ahead of where it was set when I cycled the power.
> 
> Anyone else have something similar happening or is it just my rig?
> 
> Thanks in advance for any info you can share.
> 
> 73 - Arnie KA0NCR
> K3 #185