[time-nuts] WWVB Chronverter update progress

paul swed paulswedb at gmail.com
Wed Aug 29 11:39:26 EDT 2018


Mark I looked at the 7 and the pulse out wasn't obvious. Indeed at that
cost it would be great if it did produce 60 KHz as it would eliminate the
whole counter chain + power. The chronverter wants GPS data so its a nice
answer.
I have some 6s here so will start with that. Love low power and crazy cheap
technology.
Regards
Paul.
WB8TSL

On Tue, Aug 28, 2018 at 9:52 PM, Mark Sims <holrum at hotmail.com> wrote:

>
> Like I mentioned before,  get a $10-ish Ublox Neo7 board/antenna off of
> Ebay,  program one of the Ublox pulse output pins for 60 kHz.  Add your
> favorite microprocessor to talk to the Ublox and drive the modulator.   The
> Ublox 60kHz output should be more than accurate and stable enough to do the
> job.
>
> I don't know how well 77.5 kHz for DCF would work, but I suspect it might
> work.
>
> ----------------
>
> >If you're going to reference it from a GPSDO anyway, why worry about a
> TCXO reference (and power too, for that matter). You can easily make the
> 60 kHz from the 10 MHz.
>
> For example, with two 74HC390s and a 74HC86 you can make 50 kHz and 10
> kHz and mix them with one EXOR section of the '86 to have 60 kHz
> available
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