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

[Barry LaZar]

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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