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

[Wayne Burdick]

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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