[time-nuts] WWVB Chronverter update progress

paul swed paulswedb at gmail.com
Tue Aug 28 14:54:21 EDT 2018


Well the 9.6 MHZ/160 is working really well. The vectron VTO is .032 Hz
high and when heated to 100 drops to .005 Hz.
Carrier lights turn on ASAP on the spectracoms and truetimes. So time to
add the modulator and some low pass filtering and then antennuate to
something like -60 to -70 db for the good clocks.
Then finally back to the chronverter and adding gps to it for the correct
time.
Regards
Paul

On Mon, Aug 27, 2018 at 11:00 PM, paul swed <paulswedb at gmail.com> wrote:

> Ed
> Thanks for the clue. Well on the way with the 9.6 MHz. But I think I may
> also have something in the 15.360 range.
> Darn soldered things to quickly. :-)
>
> On Mon, Aug 27, 2018 at 10:50 PM, ed breya <eb at telight.com> wrote:
>
>> I remember I have a bunch of 15.360 MHz TCXOs that were very common - I
>> think they came from some big old cell phones I junked out long ago - you
>> know, the kind that were bolted into the car. This is still a standard
>> frequency, and it would be nice for making 60 kHz by simply diving by 256.
>> A quickie search for modern ones shows this as an example:
>>
>> https://www.mouser.com/datasheet/2/3/AST3TQ-28-461101.pdf
>>
>> I believe this class of parts will easily do the job, and there are
>> likely lesser, cheaper ones that would suffice.
>>
>> Ed
>>
>>
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>
>


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