[time-nuts] WWVB Chronverter update progress

paul swed paulswedb at gmail.com
Tue Aug 28 16:57:47 EDT 2018


Yup running it without any filtering at the moment. Just completed the
modulator using a tri-state 74ls125. Works well.
But now the real test, does the symetricom lock to the chroneverter? As I
type this it just did. Running about -50 db. Now for the true time.
Regards
Paul

On Tue, Aug 28, 2018 at 4:25 PM, Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> The clock could care less if the harmonics are at -10 dbc or -100 …..
>
> Bob
>
> > On Aug 28, 2018, at 2:54 PM, paul swed <paulswedb at gmail.com> wrote:
> >
> > 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
> >>>
> >>>
> >>> _______________________________________________
> >>> time-nuts mailing list -- time-nuts at lists.febo.com
> >>> To unsubscribe, go to http://lists.febo.com/mailman/
> >>> listinfo/time-nuts_lists.febo.com
> >>> and follow the instructions there.
> >>>
> >>
> >>
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at lists.febo.com
> > To unsubscribe, go to http://lists.febo.com/mailman/
> listinfo/time-nuts_lists.febo.com
> > and follow the instructions there.
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe, go to http://lists.febo.com/mailman/
> listinfo/time-nuts_lists.febo.com
> and follow the instructions there.
>


More information about the time-nuts mailing list