[time-nuts] eLORAN 99600 monitoring at 100 KHz

[paul swed]

David oh for the old days. If I put my ear to the ground I could hear it
down in Franklin Ma. :-)
But its been a pretty steady -50 db here on the whip and preamp.
Regards
Paul
WB8TSL

On Fri, Aug 14, 2020 at 10:24 PM David G. McGaw <david.g.mcgaw at dartmouth.edu>
wrote:

> I had to change from my "Marine Standard" 3 ft whip and preamp to a
> small loop antenna and high-gain preamp, but am getting the signal in a
> lot of noise and spherics in NH such that an Austron 2100F is locking.
> There is a big difference between 1MW from Nantucket and 75kW from New
> Jersey!
>
> David N1HAC
>
> On 8/14/20 5:52 PM, Dana Whitlow wrote:
> > Thanks, Paul.
> >
> > Does this "standard marine preamp" have an integrated antenna of some
> kind?
> > If not (or  you're not using it), can you tell me about the antenna you
> > *are* using?
> >
> > I've not "heard" so much as a peep here in south central Texas, but have
> > only
> > looked in the daytime.  Is the station transmitting around the clock?
> >
> > I do suffer from an abysmally-high noise level here.  But I'm trying to
> get
> > a
> > handle on whether it's even worth my trying further.
> >
> > Dana
> >
> >
> > On Fri, Aug 14, 2020 at 4:23 PM paul swed <paulswedb at gmail.com> wrote:
> >
> >> Dana that was 11:29 am when you emailed me. Looking at the 3586 its -49
> db
> >> now.
> >> To your second question I can't really know that. Its a standard marine
> >> preamp. Might guess 20-30 db. But its nothing special. Made by a company
> >> STS. Classic FET, filter , 2 X transistor design. It would be a bit of a
> >> math guess to use the 3586 reading and deduce the actual field strength.
> >> Regards
> >> Paul
> >> WB8TSL
> >>
> >> On Fri, Aug 14, 2020 at 4:08 PM Dana Whitlow <k8yumdoober at gmail.com>
> >> wrote:
> >>
> >>> Paul,
> >>>
> >>> What time of day did you measure that signal strength?
> >>>
> >>> And what are the characteristics of the "standard marine preamp"?
> >>> Most importantly, what field strength corresponds to 1000 uV output
> from
> >>> it?
> >>>
> >>> Thanks,
> >>>
> >>> Dana
> >>>
> >>>
> >>> On Fri, Aug 14, 2020 at 12:17 PM paul swed <paulswedb at gmail.com>
> wrote:
> >>>
> >>>> Hello to the group.
> >>>> The signal is on the air.
> >>>> I have just discovered one of my favorite HP 3586 SLVM has an issue
> >> with
> >>>> sensitivity.
> >>>> For reference in Boston on a second 3586 the level is -51db avg. or
> >> 1000
> >>> uv
> >>>> using a standard marine preamp 6' off the ground. The signal should
> >>> remain
> >>>> on until the 20th.
> >>>> I think this also points to the funny issue I was seeing yesterday
> with
> >>>> intermittent signal levels. Darn one more project to the list.
> >>>> Regards
> >>>> Paul
> >>>> WB8TSL
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