[Elecraft] K3: Use AM SYNC on WWV to calibrate DDS?

[Mike Harris]

G'day,

And remember that this isn't a once and for all time operation. 
Components age and reference oscillators have long term drift. 
Method 2 is easy to do.

Regards,

Mike VP8NO

----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at embarqmail.com>
To: "K1LI" <nekvtster at gmail.com>
Cc: <elecraft at mailman.qth.net>
Sent: Wednesday, May 19, 2010 10:04 AM
Subject: Re: [Elecraft] K3: Use AM SYNC on WWV to calibrate DDS?


> Brian,
>
> I would suggest you re-do the Reference Oscillator calibration - 
> page 50
> in the manual, use Method 2.
>
> 73,
> Don W3FPR
>
> K1LI wrote:
>> AM-S in FW 3.97 works great. I notice that my frequency displays 
>> 15.000.024
>> when tuning in WWV on 15MHz and 10.000.16 on the 10MHz signal. 
>> (Happily, the
>> displayed frequency is the same on both "sidebands.") The ratio 
>> of the
>> 15MHz/10MHz received frequencies is equal to the ratio of the 
>> 24Hz/16Hz
>> difference between the displayed readings and the "actual" signal
>> frequencies (I trust WWV!).
>>
>> Is there a lesson here that I can use to improve the frequency 
>> calibration
>> of my K3?