[time-nuts] WWVB Signal Generator

[paul swed]

That would be a great neighbor to have but I can tell you around here its
the phone. Not to concerned about someone putting up a wwvb replacement.
And I can always up the power. Chickle.
Regards
Paul

On Sun, Aug 26, 2018 at 2:34 PM, Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> The gotcha is if you have neighbors two or three doors away that *also*
> put up one of
> these devices. You then have a real problem with the neighbor(s) in the
> middle. The
> wavelength is long enough that Raleigh issues won’t get you. You still
> have the two
> signals ( at slightly different frequencies) beating against each other.
> The result is
> going to show up as who knows what to this or that receiver. With a
> precision receiver,
> you might even have issues from the guy two houses away …...
>
> Bob
>
> > On Aug 26, 2018, at 1:08 PM, paul swed <paulswedb at gmail.com> wrote:
> >
> > Agree with the conversation. With respect to neighbors when the day comes
> > they may ask you to boost your signal. :-)
> > Granted maybe the day won't come but at least having your local clocks
> work
> > is nice.
> > Regards
> > Paul
> > WB8TSL
> >
> > On Sat, Aug 25, 2018 at 10:29 PM, Dana Whitlow <k8yumdoober at gmail.com>
> > wrote:
> >
> >> With the watch being physically close to the faux WWVB "transmitter",
> one
> >> is in
> >> the so-called "near field" regime, where the field strength (V/m) falls
> as
> >> the inverse
> >> cube of the distance.  If one is putting the watch, say, within a few
> >> inches of the
> >> transmitter, reliable reception should be available yet the signal
> should
> >> be literally
> >> undetectable by any practical receiving device more than a few feet
> away.
> >> Hence,
> >> meeting the FCC field strength limit should be trivial.if the device is
> >> used as pictured.
> >> However, if one cranks up the power enough to reliably cover one's
> entire
> >> house,
> >> then there might be a problem depending how close the nearest neighbor
> >> lives,
> >> even at levels well within the FCC limit he quotes.
> >>
> >> Taking the near field relationship in hand, 40 uV/m at 300m would
> translate
> >> into
> >> a whopping 0.135 V/m at 20 meters range, more than enough to feed most
> >> peoples'
> >> entire house.  So the pragmatic issue would again be- neighbors.  On the
> >> other
> >> hand, most of them would never be aware of the local signal as long as
> they
> >> get good
> >> time settings, unless they live close enough to Ft. Collins for the two
> >> signals to
> >> contend with each other.
> >>
> >> It looks to me like the ferrite rod antenna is considerable overkill.
> Even
> >> with no
> >> purposeful antenna I'd expect leakage to yield sufficient signal for at
> >> least a few
> >> inches.
> >>
> >> Dana
> >>
> >>
> >> On Sat, Aug 25, 2018 at 8:11 PM Wayne Holder <wayne.holder at gmail.com>
> >> wrote:
> >>
> >>> This guy has what looks like a well thought out design using a
> Sirf-Based
> >>> GPS and ATTiny44A chip to generate a signal to update his watch:
> >>>
> >>>  https://www.anishathalye.com/2016/12/26/micro-wwvb/
> >>>
> >>> Unfortunately, he doesn't seem to have published a schematic or his
> >> source
> >>> code.  But, he covers enough detail that I think it wouldn't be too
> hard
> >> to
> >>> replicate what he's done.  Or, perhaps he would disclose these details
> if
> >>> contacted.
> >>>
> >>> Wayne
> >>>
> >>> On Sat, Aug 25, 2018 at 4:33 AM, D. Resor <organlists at pacbell.net>
> >> wrote:
> >>>
> >>>> I thought I would search in a different way for a WWVB signal
> generator
> >>>> design.  I found this item.  While the designer explains it isn't as
> >>>> accurate as WWVB it may be another starting point.
> >>>>
> >>>> http://www.tauntek.com/wwvbgen-low-cost-wwvb-time-
> signal-generator.htm
> >>>>
> >>>>
> >>>>
> >>>> Donald R. Resor Jr. T. W. & T. C. Svc. Co.
> >>>> http://hammondorganservice.com
> >>>> Hammond USA warranty service
> >>>> "Most people don't have a sense of humor. They think they do, but they
> >>>> don't." --Jonathan Winters
> >>>>
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