[time-nuts] wtd: WWVB info

paul swed paulswedb at gmail.com
Tue Aug 11 08:18:31 EDT 2015

If you need time the GPS chips are the way to go.
Heavens for $11 I think you get the complete system with antenna.
The old wwvb chips do still work as well as they ever did. They detect AM
and thats still a part of the format. They are as reliable as they ever
were. (Sort of not if you live on the East coast) due to facts stated
The new wwvb format indeed does improve on all of the issues stated. There
are papers written about it and are good reads.
So it could be worth while to build up a discreet receiver PLL and such to
recover the data. But as a company Everset has to find the market that will
keep them in business. I suspect thats why we do not see any products.
If they are successful I will expect something like the following.
Clocks that can decode time easily 99% of the time per day. I have measured
the am chips and they are sub 30% of the day.That these may be $50 or more
to start. They actually consistently work in any orientation. No more must
face west.
I hope they are succesful. But if you are a builder/programmer everything
you need is available.

On Tue, Aug 11, 2015 at 3:14 AM, Chris Albertson <albertson.chris at gmail.com>

> You might look into GPS devices.  They aren't quite as cheap as the WWVB
> > chips, but there are lots of them on the market.
> Yes GPS receivers can be very cheap and self contained and much easier yo
> use than those WWVB chips.  I have two of the chips.  I don't think they
> work now that WWVB has changed format and even back in the day they only
> worked for a few hours at night.  GPS is better.
> But there is another good source for correct time.  Most people today have
> WiFi in their house, at school and at work.  If the clock is going into an
> area where WiFi  is available then it can connect to NTP.    If the clock
> connects to WiFi you can save money and parts count by not needing any
> physical controls on the clock for setting or to control options as all
> that can be done from a smart phone's web browser
> --
> Chris Albertson
> Redondo Beach, California
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

More information about the time-nuts mailing list