[Elecraft] K3(s) main oscillator calibration

[Dave Cole]

Hi,

As the other station siad, you will have Doppler issues.  Also the K3 
tunes in steps, which make sustained .1 hz accuracy a dream, not 
attainable.  It looks to tune in .25 Hz., or larger steps.  I am going 
from memory here, so it may be something different.

I wanted to use my K3 to watch Ionospheric shifting, via Doppler shifts, 
from WWV.  I am unable to as a result of the method Elecraft chose for 
tuning.

I have the TXCO, and that just provides a reference for the radio, it 
does not make the steps go away...

I was quite disappointed when I discovered this, but, the good stuff in 
the rest of the radio makes up for that small loss.  I'll buy some 
stable rig that uses analog tuning.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 6/6/20 2:31 PM, W2xj wrote:
> the problem with WWV is doppler shift.
> 
> Sent from my iPad
> 
>> On Jun 6, 2020, at 5:27 PM, w4sc <w4sc at windstream.net> wrote:
>>
>> I like the zero beat WWV method.  Used it in the Navy to calibrate / PM the 10MHz frequency standards aboard ship. Requires the least amount of test equipment!  If you can receive WWV on 20MHz to calibrate the K3/K3S, all the better,
>>
>> Using a frequency counter I would think  0.1Hz resolution and attending accuracy would be in order, plus an accurate time base in the counter, GPS locked,,, or oven-ized, on all the time reference ,,, ect.
>>
>> Ben W4SC
>>
>>
>> Sent from Mail for Windows 10
>>
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> 
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