KX3 Temperature Compensation

[Jim Brown-10]

A year or so ago, I performed the temperature compensation routine on my
KX3, with the goal of being able to use it with WSJT modes like JT65,
JT9, MSK144. I loaned it to W6JTI for his expedition to CM79, and acted
as his pilot, monitoring him on the air from his home a few miles away.
The radio drifts quite badly -- 600 Hz or more on 6M. Am I missing a
menu setting to turn TC on?  Any other possible causes (other than that
I screwed up the rountine)?

I told Frank to keep the rig so that he can get familiar with it, but
we'll be together on FD, so I'd like to fix it if possible.

Thanks and 73, Jim K9YC

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[ve3ibw]

Hi Jim,

How I check to ensure that temp compensation is enabled and is using the
values I had previously gathered, during the extended temp compensation, is
to look at the VFO B display section of the KX3 screen, (special display
section - Synthesizer (OSC) temperature) for an asterisk between the
letters OSC and the temp; e.g., OSC*31C.

If you do not see this asterisk, then the temp compensation you gathered is
not being applied.  I found standard compensation values not to be
sufficient for JT modes.

There is a step in the extended temp compensation manual at Elecraft's site
(http://www.elecraft.com/manual/KX3%20Custom%20VFO%20TC%20rev%20A8.pdf)
that allows one to toggle between standard and custom.  It says, when in
the Ref Cal menu option (having unlocked it)...
Tap CMP to switch temperature compensation from STANDRD to CUSTOM.

Custom will be indicated as an asterisk between Ref Call (e.g., REF * CAL).

I would suggest re-familiarizing yourself with the temp compensation guide
and read through the directions, but don't do the directions other than to
verify certain button presses that give information.  You likely will be
semi-unhappy if you accidentally clear the values you previously collected
:-).

Alternatively, if you have a backup of the KX3 configuration using the KX3
Utility, I believe the temp compensation values are stored in that file.
Confirming with Elecraft if that is indeed the case would be prudent as I
am not completely sure.

regards,
Brian
VE3IBW


On Sun, Jun 18, 2017 at 11:16 PM, Jim Brown <[hidden email]>
wrote:

> A year or so ago, I performed the temperature compensation routine on my
> KX3, with the goal of being able to use it with WSJT modes like JT65, JT9,
> MSK144. I loaned it to W6JTI for his expedition to CM79, and acted as his
> pilot, monitoring him on the air from his home a few miles away. The radio
> drifts quite badly -- 600 Hz or more on 6M. Am I missing a menu setting to
> turn TC on?  Any other possible causes (other than that I screwed up the
> rountine)?
>
> I told Frank to keep the rig so that he can get familiar with it, but
> we'll be together on FD, so I'd like to fix it if possible.
>
> Thanks and 73, Jim K9YC
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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