Hi Jim,

Thanks for the suggestion.

Yes, it's located in Colorado (and is also run by NIST), but this is a
separate station from WWV (which transmits on 5,10,15, and 20 MHz).  WWVB
is intended to provide a single frequency which can reliably be received
during at least part of every day in the whole continental US. That's why
they use such a low frequency, to make the dominant propagation mode ground
wave (although if you look at their coverage diagrams it does appear that
some skip occurs at the edges of the coverage area during some parts of the
day).

So, no, I haven't recently tried listening on the shortwave freqs, but even
if I did, it wouldn't really tell me anything about whether WWVB in on the
air or not.

Of course, it doesn't help that this project is due tomorrow (I did have a
longer time to do it but couldn't really start until about a week ago
because of other work) :-)

I have tried emailing the people who run WWVB to ask if there has been an
outage but I have not yet gotten a response.

Sean



At 03:04 PM 4/18/01 -0700, you wrote:
>  Sean,
>
>  Is this station located in Colorado?   Have you tried receiving on
>  the shortwave frequencies?  (5, 10, 15, 20Khz?).  Or what about
>  WWVH (Hawaii). Of course this is doubtful.   Just a thought.
>
>                                            Regards,
>
>                                           Jim KA9QHR
>
>On Wed, 18 April 2001, "Sean H. Breheny" wrote:
>
> >
> > Hi everyone,
> >
> > I am building a WWVB receiver for my Applied Signal Processing class and
> > I'm having some trouble that I think some people here may be able to help
> > with. I had it working fine several days ago in northeast Pennsylvania(I
> > was getting a strong signal, at least 12dB S/N ratio and I could hear it
> > loud and clear). When I came back up to New York (Ithaca, central
> > southern-tier,only 100 miles away) I haven't been able to get it to work
> > (I've been trying since about 11pm last night and I get no signal at all,
> > just quiet static, as if the transmitter were off the air). I have checked
> > over the wiring and I don't think anything has changed. I am also able to
> > hear weak signals from computer monitors in nearby rooms and my own monitor
> > saturates the audio output so I think it is working.
> >
> > First of all, can anyone who has a WWVB receiver or self-setting clock tell
> > me if you have received a WWVB signal in the last 12 hours(from 9:00 until
> > 21:00 Wednesday 18 April UTC)? They have been doing antenna repairs lately
> > and have had some outages, so it is possible that they have been off
> the air.
> >
> > Secondly, my understanding is that in most of the continental US, WWVB is
> > received through ground-wave propagation (it's at 60kHz) which should have
> > no problem entering a valley which is several miles wide, right?I know that
> > my area is well within the stated coverage area for at least a large part
> > of the time I have been listening.
> >
> > Thanks,
> >
> > Sean
> >
> > --
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>
>jim@jpes.com
>
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