[time-nuts] WWVB for Time Nuts

paul swed paulswedb at gmail.com
Sat Aug 9 16:02:24 EDT 2014


Bob
Indeed I have no plans to sell anything. If I can ever get a digital
solution working for wwvb.
What I can say is whatever I do will be shared here. For good or bad.
Regards
Paul
WB8TSL



On Sat, Aug 9, 2014 at 3:56 PM, Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> Keep in mind that the patent(s) do not keep you from building a part for
> your own use. Regardless of what they do / do not patent, a TimeNut can
> still build (and use for themselves) what ever they wish.
>
> ————
>
> Now, if you (after careful examination) believe that the privately held
> patents keep you from building a receiver for a Federally Funded service -
> talk to your elected representatives. They are the ones who can / will fire
> up a committee to look into this sort of stuff.  I think I would want to
> have some information on license costs before I made that phone call though.
>
> Bob
>
> On Aug 9, 2014, at 1:49 PM, Brooke Clarke <brooke at pacific.net> wrote:
>
> > Hi:
> >
> > I've been reading papers by Yingsi Liang who works for Xtendwave and she
> seems to be the key person developing the new clocks.
> > I've starting collecting info on my web page:
> > http://www.prc68.com/I/Loop.shtml#PhaseMod
> > I don't understand how Xtendwave can get patents when their work was
> partially funded by NIST?
> >
> > There are different modes that have different frame times, the Long mode
> takes 17 minutes for each of: Time, DST/LY state & Date. That's to say it
> takes 51 minutes to get all three.  Since the modulation format is in
> complete words their receiver has a problem with the inaccuracy of common
> watch crystals.  This says that for those who have a stable LO it's much
> easier to receive the BPSK signal over the times needed (probably for all
> formats).
> >
> > PS a new paper "Receiver Design of Radio-Controlled Clocks Based On The
> New WWVB Broadcast Format" came out a few days ago.
> >
> > PPS I've been having fun with theodolites and have made a table
> "Accuracy of Visual Fixes" on my Navigation page with columns headed Time,
> Angle & Distance based on the Earth rotation at:
> http://www.prc68.com/I/Nav.shtml#Accuracy
> > The idea is that a theodolite with some angular accuracy needs to be
> used with a clock that has a equivalent accuracy to get a position fix
> within some distance.
> >
> > [OT] PPPS I'm also having fun looking at the pond water in my back yard.
> > http://www.prc68.com/I/Labophot.html#Pond_Water
> >
> > --
> > Have Fun,
> >
> > Brooke Clarke
> > http://www.PRC68.com
> > http://www.end2partygovernment.com/2012Issues.html
> > http://www.prc68.com/I/DietNutrition.html
> >
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