Re: K3S & 2m Internal Transverter Calibration Problem Using External Reference

Posted by stengrevics on Aug 12, 2020; 1:54am
URL: http://elecraft.85.s1.nabble.com/K3S-2m-Internal-Transverter-Calibration-Problem-Using-External-Reference-tp7664014p7664029.html

Ben,

The K144XV & Phase lock calibration steps have already been performed.  The problem arises when using an external reference oscillator.  

Elecraft support emailed.

Thanks,

John
WA1EAZ

> On Aug 11, 2020, at 7:14 PM, w4sc <[hidden email]> wrote:
>
> Read the following:
>  
> K144XV manual pp20
> K144XV Reference Oscillator Phase Lock Option Manual. Pp 11
>  
> Once the K3S 49MHz oscillator is calibrated, leave alone.
>  
> The LOs (plural,,,116MHz and 118MHz) are locked to the 10MHz reference (which, depending where you are in the 2M band).  If there is no 10MHz reference applied, keeping the desired accuracy may be impossible over a range of temperature.
>  
> You should be able to attain +- 10Hx accuracy according to the K144XV manuals.  If the 800Hz error cannot be corrected by the procedure outlined, I suggest contact Elecraft support.
>  
> Ben W4SC
>  
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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