[Elecraft] [K3] K3EXREF K144REFLK and K144XV

[Wayne Burdick]

On Jun 9, 2011, at 1:42 PM, Bruce Beford wrote:

> I understand that when using the K3EXREF there is no need for this  
> data.
> But, what I was wondering is if this would be a method by which an  
> end user
> of the KTCXO3-1, (or Elecraft internally) could use this or a  
> similar method
> to compile this 1 degree increment data easily? It could be used  
> when not
> running with the external ref online, or could be included as test  
> data from
> Elecraft with a KTCXO3-1 purchase.

While this is possible, it may not be practical. We don't have  
facilities for wide temperature cycling of the K3s (we do burn them  
in, of course), and it would be expensive and labor-intensive to add  
this. My contention is that 0.5 ppm with the high-precision oscillator  
is sufficient for the vast majority of users, and most of those who  
need a better TC could use the K3EXREF. This leaves a small number who  
might be interested in tighter calibration data (1 degree units), and  
I'm suggesting that the only way we can handle this at present is to  
allow users to generate their own data.

>
> I am also interested in the K144XV's PLL being corrected by the  
> K3EXREF, and
> hopefully, an automated correction instead of the 116MHz/118MHz manual
> calculation and data entry now required when using the K144RFLCK.

This I'm going to do for sure.

Wayne

>
> 73,
> Bruce
> N1RX
>
>
>
>> There is no need to do any type of temperature correction if you're
>> using the K3EXREF. This option uses an external reference to send
>> corrections to the K3's MCU automatically so that it always knows the
>> actual frequency of the 49-MHz oscillator.
>
>> What some are asking for is that the K144XV's PLL module also receive
>> the benefit of this correction when the K3EXREF is installed.  
>> That's a
>> small matter of programming on my part.
>
>> 73, Wayne N6KR
>
>
>
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