[time-nuts] RFDO - Experience and questions

[paul swed]

Just for the heck of it fired up the hp3586 on 162KHz tuned +/- 2 Khz both
a vertical antenna 67 feet and horizontal dipole 160 ft. Nothing at 1800
utc near Boston Ma.
But in the sun for another7 hours.
Regards
Paul
WB8TSL

On Mon, Mar 6, 2017 at 9:47 AM, Graham / KE9H <ke9h.graham at gmail.com> wrote:

> Anders:
>
> What antenna are you using that you call the "mini-whip?"
>
> Specifically, how long is the "whip?"
>
> Thanks,
> --- Graham
>
> ==
>
> On Mon, Mar 6, 2017 at 3:57 AM, Anders Wallin <anders.e.e.wallin at gmail.com
> >
> wrote:
>
> > FWIW, for fun I measured the LF stations MSF, DCF, and TDF just a few
> days
> > ago. The signals look like this from our site:
> > http://www.anderswallin.net/wp-content/uploads/2017/02/MSF.jpg
> > http://www.anderswallin.net/wp-content/uploads/2017/02/DCF.jpg
> > http://www.anderswallin.net/wp-content/uploads/2017/02/TDF.jpg
> >
> > I guess the +/- 40 Hz side-bands on TDF are by design?
> >
> > I have an SDR set up also, so the gnu-radio demodulators could run in
> > parallel on each of these, and the sdr sampling clock could come from a
> > local clock. One more project on the to-do list...
> >
> > Anders
> >
> >
> > On Mon, Mar 6, 2017 at 12:42 AM, Iain Young <iain at g7iii.net> wrote:
> >
> > > On 05/03/17 20:23, paul swed wrote:
> > >
> > > Gilles what signal is that at 162KHz. A European station? Nice thats
> its
> > C
> > >> controlled.
> > >>
> > >
> > > That's TDF from France. Their equivalent of WWV/MSF/DCF. Used to carry
> > > the AM Station France Inter as well, but that went when France turned
> > > off all LW, MW, and LORAN stations at the end of 2016.
> > >
> > > The Time Signal is Phase Modulated (I have a gnuradio decoder which
> > > works very well if anyone is interested)
> > >
> > > See https://en.wikipedia.org/wiki/TDF_time_signal and
> > > https://en.wikipedia.org/wiki/Allouis_longwave_transmitter
> > >
> > > With no AM modulation, there are obvious benefits with regards to using
> > > it as a frequency reference. Average phase and frequency deviation is
> > > zero over 200msec (see link above for details)
> > >
> > >
> > > Iain
> > >
> > > PS, The signal is used by the French railways SNCF, the electricity
> > > distributor ENEDIS, airports, hospitals according to the Allouis link
> > > above
> > >
> > >
> > > _______________________________________________
> > > time-nuts mailing list -- time-nuts at febo.com
> > > To unsubscribe, go to https://www.febo.com/cgi-bin/m
> > > ailman/listinfo/time-nuts
> > > and follow the instructions there.
> > >
> > _______________________________________________
> > 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.
> >
> _______________________________________________
> 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.
>