[Elecraft] JT65 requirements, and a possible external reference-locking option for the KX3

[Wayne Burdick]

Lance Collister, W7GJ wrote:

> No experience with the KX3 here yet, but this makes me wonder about  
> the frequency
> stability on 6m with full throttle out on JT65A mode for 50 seconds  
> out of every
> other minute, hour after hour....
>
> My K3 has always been rock solid.

Hi Lance,

The K3's oscillator subsystem is a factor of about 10 more expensive  
to manufacture than the one in the KX3. It also takes up about 100  
times more space, which is the real problem.

But back to JT65. If it turns out the KX3's temperature compensation  
can't provide the stability you'd like, we could design an external 10- 
MHz locking module for it. This module would be called a "KX3EXREF" --  
the equivalent of the K3EXREF, which does the same job for the K3.

The only drawback to such a module is that it would have to be  
installed in place of the planned 2-meter module. It would use the SMA  
connector as the 10-MHz input.

Would this be of interest?

73,
Wayne
N6KR