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

[Dick Lindzen]

Ditto for me.  The KX3 with a high stability 
oscillator would be ideal for JT-65.

73,
Dick
WO1I


At 11:45 AM 7/18/2012, Barry LaZar wrote:
>Wayne,

>   I only use 2 meters as a local intercom. If I want to reach out and
>touch people, I use HF. Giving up 2 meters on my KX3 for a high
>stability oscillator appears to be a good trade. And from the sound of
>your comments, it could be optional meaning a user would opt for what
>best fit his requirements. Go for it if you think you can sell enough to
>pay the R/D costs.
>
>73,
>Barry
>K3NDM
>
>
>
>On 7/17/2012 8:17 PM, Wayne Burdick wrote:
> > If we took this route, we'd have three categories of KX3 users: (a)
> > wants the ultimate in stability but doesn't need 2 meters; (b) wants 2
> > meter coverage and is OK with nominal stability; (c) curses me for
> > making the KX3 too small :)
> >
> > Wayne
> >
> >
> >
> > On Jul 17, 2012, at 4:12 PM, Oliver Dröse wrote:
> >
> >> Nice idea about how to fix it, Wayne. But how would this cure
> >> stability issues on 2 m then? ;-)
> >>
> >> 73, Olli - DH8BQA
> >>
> >>
> >>
> >> ----- Original Message ----- From: "Wayne Burdick" <n6kr at elecraft.com>
> >> To: <w7gj at q.com>
> >> Cc: "Elecraft" <elecraft at mailman.qth.net>
> >> Sent: Tuesday, July 17, 2012 4:25 AM
> >> Subject: [Elecraft] JT65 requirements,and a possible external
> >> reference-locking option for the KX3
> >>
> >>
> >>> 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
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
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