On Sun, Feb 28, 2016 at 3:09 PM, Sanjeev Gupta ghane0@gmail.com wrote:

Apologies, this should have been:

I am reviewing and expanding and documentation for the NTPSec project <
http://www.ntpsec.org >, a fork of NTP.

--
Sanjeev Gupta
+65 98551208    http://www.linkedin.com/in/ghane

Bob Camp wrote:

I'm basically familiar with the ground wave / sky wave problem. Quite
some time ago I had found a PDF on the 'net with some explanations,
measurements, and a U.S. map showing e.g. which regions were mostly
affected by temporary cancellation due to interference of the sky and
groundwave with the same amplitude.

If I remember correctly this was an old publication from NIST or so.
Eventually it's hard to find by search machines since it wasn't a
generated PDF with text, but just a scan of an old printed article.

Unfortunately I hadn't saved a copy, and now I'm unable to find it.
Anybody has a hint what this could have been?

Thanks,

Martin

On Sun, Feb 28, 2016 at 3:09 PM, Sanjeev Gupta ghane0@gmail.com wrote:

Folks, I am trying to trace down xtendwave.  They seem to have released a
Everset IC, and then renamed themselves to Everset in 2013 or 2014.

Is there any commercial gear available for WWVB at all, today?  Price is
not an issue, just a public product page will do.

--
Sanjeev Gupta
+65 98551208    http://www.linkedin.com/in/ghane

On Tue, Mar 01, 2016 at 03:44:01PM +0800, Sanjeev Gupta wrote:

It's not an IC, exactly, it's a bare product intended for 

integration into something else.

There's plenty of older gear out there that did not phase lock,

and works just fine.  Existing chipsets and receivers work fine for
those.  Even phase locking receivers can be modified.

They changed the simple carrier to a phase keyed one, but they

did not change the amplitude coding.

I know Meinberg had WWVB modules available for some of their

products, you might see what they are up to.

--msa

Sanjeev Gupta wrote:

Contact Paul Swed or me off-list about this.

Time by radio -- WWVB (and DCF-77, MSF, JJY) -- is still in use. But most of the high-end commercial timing companies have long since switched to GPS. Now that most everyone on the planet has a mobile phone or WiFi or internet, the need for 1-bit-per-second time over LF or SW radio is not as great as it was 20 years ago.

But you asked for product pages. Try these:

https://www.meinbergglobal.com/english/products/usb-wwvb-clock.htm

https://www.lacrossetechnology.com/clocks/atomic-digital/wall/
https://www.lacrossetechnology.com/clocks/atomic-analog/

http://www.casio.com/products/Watches/wave_ceptor/

http://www.jp-watch.com/product/44

http://www.ebay.com/itm/181283274562

/tvb

Hi

GPS has become so cheap and it’s so accurate under normal conditions that
you rarely see anything else considered for this stuff. That’s not to say that a
monoculture is a good idea (it isn’t).

Bob

As Tom mentioned I am familiar with the chips. But the bottom line is there
are no chips either old style or new around anymore from what I have seen.
If you can find the consumer atomic clocks that are pretty rare these days
you can get the AM clock receiver from those. The new chips (Literally the
die, not even an soic) was supposed to show up in clocks around the new
year. They never did or at least its totally not apparent. The intent was
not for consumer but embedded in things like stop lights.
But this thread shifted from the original request I believe for something
that could be used in Singapore.
Regards
Paul
WB8TSL

On Tue, Mar 1, 2016 at 7:39 AM, Bob Camp kb8tq@n1k.org wrote: