[time-nuts] WWVB Chronverter update progress

paul swed paulswedb at gmail.com
Wed Aug 29 18:36:59 EDT 2018


Mark
OK I did indeed find what you suggested pretty neat most likely will order
one and see whats what.
That certainly simplifies old 60 KHz and in fact may be traceable. Pretty
amazing.

On Wed, Aug 29, 2018 at 11:39 AM, paul swed <paulswedb at gmail.com> wrote:

> 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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>
>


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