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K3: Frequency Stability of radio

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NK7Z

K3: Frequency Stability of radio

Hi,

I use a program called SBSpectrum to graph very subtle changes in
Doppler of the Ionosphere, while using WWV as a standard. The changes
are on the order of only a few Hz at most.

I have noted the K3 makes frequency corrections every few minutes in
discrete steps. These steps are too large for what I want.

If I add an external frequency standard, like a GPSDO, will the K3 still
display these steps in frequency correction, or will the K3 simply lock
to the external signal source and not move in frequency?

I asked this once before about a year ago, and got an answer, but I have
forgotten that answer... Sorry for the repeat question.

--
73s and thanks,
Dave
NK7Z
http://www.nk7z.net
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ng7m

Re: K3: Frequency Stability of radio

Here is a link to the K3EXREF, it will explain how it works.... the REFCAL
will adjust dynamically based on the reference input... what you tune to
will stand on frequency as far as the frequency displayed, just the
reference frequency will adjust on the fly.

http://www.elecraft.com/manual/K3%20EXREF%20Installation%20and%20Operation%20Manual.pdf

mg NG7M

On Sat, Aug 12, 2017 at 5:00 PM, Dave Cole <[hidden email]> wrote:

> Hi,
>
> I use a program called SBSpectrum to graph very subtle changes in Doppler
> of the Ionosphere, while using WWV as a standard. The changes are on the
> order of only a few Hz at most.
>
> I have noted the K3 makes frequency corrections every few minutes in
> discrete steps. These steps are too large for what I want.
>
> If I add an external frequency standard, like a GPSDO, will the K3 still
> display these steps in frequency correction, or will the K3 simply lock to
> the external signal source and not move in frequency?
>
> I asked this once before about a year ago, and got an answer, but I have
> forgotten that answer... Sorry for the repeat question.
>
> --
> 73s and thanks,
> Dave
> NK7Z
> http://www.nk7z.net
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

--
M. George
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NK7Z

Re: K3: Frequency Stability of radio

In reply to this post by NK7Z

I'll respond to my post to keep things short... Thank you to both
posters for the info. You answered my questions.

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 08/12/2017 04:00 PM, Dave Cole wrote:

> Hi,
>
> I use a program called SBSpectrum to graph very subtle changes in
> Doppler of the Ionosphere, while using WWV as a standard. The changes
> are on the order of only a few Hz at most.
>
> I have noted the K3 makes frequency corrections every few minutes in
> discrete steps. These steps are too large for what I want.
>
> If I add an external frequency standard, like a GPSDO, will the K3 still
> display these steps in frequency correction, or will the K3 simply lock
> to the external signal source and not move in frequency?
>
> I asked this once before about a year ago, and got an answer, but I have
> forgotten that answer... Sorry for the repeat question.
>

______________________________________________________________
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Post: mailto:[hidden email]

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Mike Harris-9

Re: K3: Frequency Stability of radio

A pity an overview of the answers wasn't shared.

Regards,

Mike VP8NO

On 12/08/2017 22:08, Dave Cole wrote:

> I'll respond to my post to keep things short... Thank you to both
> posters for the info. You answered my questions.
>
> 73s and thanks,
> Dave
> NK7Z
> http://www.nk7z.net
>
> On 08/12/2017 04:00 PM, Dave Cole wrote:
>> Hi,
>>
>> I use a program called SBSpectrum to graph very subtle changes in
>> Doppler of the Ionosphere, while using WWV as a standard. The changes
>> are on the order of only a few Hz at most.
>>
>> I have noted the K3 makes frequency corrections every few minutes in
>> discrete steps. These steps are too large for what I want.
>>
>> If I add an external frequency standard, like a GPSDO, will the K3
>> still display these steps in frequency correction, or will the K3
>> simply lock to the external signal source and not move in frequency?
>>
>> I asked this once before about a year ago, and got an answer, but I
>> have forgotten that answer... Sorry for the repeat question.