I agree 100%. However, the implication for using it for the reference
oscillator calibration was / could be perceived as not a good way.
John N8UR did an interesting study on the effects.
https://www.febo.com/pages/hf_stability/
73 Ben W4SC
Sent from Mail for Windows 10
te. Likewise for time accuracy +/- 0.1 second is
>>> adequate.
>>>
>>> 73
>>>
>>> Bob, K4TAX
>>>
>>>
>>>> On 6/10/2020 11:52 AM, w4sc wrote:
>>>> How much doppler shift should be expected?
>>>>
>>
Mail for Windows 10
From: W2xj
Sent: Saturday, June 6, 2020 5:31 PM
To: w4sc
Cc: wes_n...@triconet.org; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3(s) main oscillator calibration
the problem with WWV is doppler shift.
Sent from my iPad
On Jun 6, 2020, at 5:27 PM, w4sc wrote:
I like the
hould be expected?
>>
>> Sent from Mail for Windows 10
>>
>> From: W2xj
>> Sent: Saturday, June 6, 2020 5:31 PM
>> To: w4sc
>> Cc: wes_n...@triconet.org; elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] K3(s) main oscillator calibration
>>
&
/2020 11:52 AM, w4sc wrote:
How much doppler shift should be expected?
Sent from Mail for Windows 10
From: W2xj
Sent: Saturday, June 6, 2020 5:31 PM
To: w4sc
Cc: wes_n...@triconet.org; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3(s) main oscillator calibration
the problem with WWV is doppl
How much doppler shift should be expected?
Sent from Mail for Windows 10
From: W2xj
Sent: Saturday, June 6, 2020 5:31 PM
To: w4sc
Cc: wes_n...@triconet.org; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3(s) main oscillator calibration
the problem with WWV is doppler shift.
Sent from my
You might have, but you're not who I'm thinking of:-)
On 6/6/2020 7:45 PM, Dave Cole wrote:
Thanks for the info, I think the other ham that asked Wayne, was me... :)
__
Elecraft mailing list
Home:
If you look at my earlier message in this thread, you'll see the link to nabble
and my post from 11 years ago where I describe this method. :-)
Wes N7WS
On 6/7/2020 6:03 AM, Randy Farmer wrote:
The best way I've found to calibrate the K3 reference oscillator is to use the
500 Hz and 600 Hz
The best way I've found to calibrate the K3 reference oscillator is to
use the 500 Hz and 600 Hz audio tones transmitted by WWV. I put the line
out audio through a sound card and look at it with SpectrumLab. Tune in
WWV in USB or LSB mode and tweak the reference trim until the tones are
I have seen a lot of answers.
These are all true, but what is the exact way of working.
73 Henk
-Oorspronkelijk bericht-
Van: elecraft-boun...@mailman.qth.net Namens
Wes
Verzonden: zaterdag 6 juni 2020 21:22
Aan: elecraft@mailman.qth.net
Onderwerp: Re: [Elecraft] K3(s) main oscillator
Thanks for the info, I think the other ham that asked Wayne, was me...
:) I don't need absolute accuracy, I just wanted no steps is all... I
will go pick up an older Icom, or something along that line. I had a
Pro III and it worked for my application, watching short term changes in
the
From my take, it is "ham radio" therefore +/-1 Hz. should be good
enough for most operations. After all, the K3S resolution is 1 Hz.,
+/-1 count as I see it. I can keep mine +/-2 or 3 Hz on most bands.
I use WWV with the radio in CW mode and CWT on, tune close to WWV and
press SPOT. If
All synthesized radios tune in steps. The difference between them is some are
smaller steps than others. Eleven years ago I offered a fourth method for
calibrating the reference frequency in a K3. (I suspect, but do not know that
the K3S is different.) See:
With the main K3 fine tuning at 1 Hz steps, I don't know that 0.1Hz or
even 0.25Hz doppler shift will matter much in the final result.
My frequency counter is good to 10 exp-9 which equates to +/-0.1 Hz at
the TCXO frequency, so the WWV method provides as good or better
accuracy, even
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
the problem with WWV is doppler shift.
Sent from my iPad
> On Jun 6, 2020, at 5:27 PM, w4sc 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
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
The various reference calibration methods, including direct measurement of the
TCXO that I do, just determine what the actual reference frequency is, but don't
change it.
This value is then used internally to compute the correct frequencies.
Wes N7WS
On 6/6/2020 11:47 AM, h...@kpnplanet.nl
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