[time-nuts] WWVB Disciplined Oscillator

[Tim Shoppa]

Wayne, there was a superb 2015 QEX article by KD2BD on his WWVB disciplined
frequency standard. Full article is online here:
http://www.arrl.org/files/file/QEX_Next_Issue/2015/Nov-Dec_2015/Magliacane.pdf

As a frequency standard I have no major disagreement with the PTTI article.
But the 100 microsecond number they give for absolute time transfer seems
to be based entirely on propagation characteristics and ignores the
difficulty I've always had in resolving the mushy edge of the timecode
pulses. 100 microseconds implies a system bandwidth of 10kHz, which is
pointless because the transmitter antenna bandwidth has to be quite narrow
- hundreds of Hz if not less.

Tim N3QE

On Sat, Apr 6, 2019 at 8:00 PM Wayne Holder <wayne.holder at gmail.com> wrote:

> Perhaps this has been mention before, but I found the following document
> while researching some details on WWVB and thought it might interest the
> group:
>
>   https://www.kevincroissant.com/WWVB/WWVB_PTTI_2018.pdf
>
> I know that Spectracom once made a WWVB Disciplined Oscillator in the form
> of the Model 8164, but I figured that this approach probably was obsolete
> in the era of GPS and network-based time. However, the author seems to have
> produced some interesting results.  Has anyone else built, or tried to
> build a WWVB Disciplined Oscillator?
>
> Wayne
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