[Elecraft] K3 Freq jumpnig when cold (50F or so)

[Bill Coleman]

Thanks Don.    I put on 5.54.... The K3 is behaving differently....   No
more jumping down 1MHz.

What it is doing now:  there's still a relay clicking once in a while as I
tune VFO A - this is within any given ham band.
Now, while tuning VFO A, VFO B will jump frequency.

Example:
VFO A = 3.853, press A>B, tune A up frequency less than a kHz, B jumps, now
A = 3.853 B = 3.994

Somewhat similar but stranger behavior on 40M
VFO A = 7.274, press A>B, tune A up freq, B jumps a LOT, now A=7.275 B =
8.600

In the time it has taken to test and scribble the results, the rig has
warmed up from 50F to 66F and it works fine  No freq jumps, no relay
clatter.

OK, I went back to Firmware  5.52 & chilled the rig (53F).   The jumping
1MHz down is back.   Hmmm...  Next step?  I'm thing the FP flash memory has
a problem with low temps.

THX,  Bill  N2BC

-----Original Message-----
From: Don Wilhelm [mailto:donwilh at embarqmail.com] 
Sent: Thursday, October 20, 2016 10:51 AM
To: Bill Coleman; Elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 Freq jumpnig when cold (50F or so)

Bill,

Try loading beta firmware 5.54 to that K3 and see if that behavior
continues.
That firmware improves the flash memory interface.
I can't say for sure if it will fix that K3, but is worth a try.

73,
Don W3FPR

On 10/20/2016 10:16 AM, Bill Coleman wrote:
> Have our club's K3/100, serial # 67xx.   When it is cold (FP=11C  52F ),
> increasing the frequency using  VFO A or VFO B causes a 1MHz jump DOWN 
> in frequency.  When reducing frequency the failure is much less 
> frequent and it will also jump down 1 MHz.  At times while tuning up 
> in freq there are some relay clicks - usually 2 -  but no frequency jumps.
>