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[aprssig] An Empiracal Analysis: 6 meter APRS or meteorscater?

JJ jjesson at voyager.net
Tue Jan 29 05:13:50 UTC 2008


Yeah, I would like to test the WSJT protocol on a AM 6M VHF radio...  If you
can put two away for me, I would appreciate it and send you the few hundred
bucks..

Thanks, Joe KB9LZB

----- Original Message -----
From: "Robert Bruninga" <bruninga at usna.edu>
To: "'JJ'" <jjesson at voyager.net>; "'TAPR APRS Mailing List'"
<aprssig at lists.tapr.org>
Sent: Monday, January 28, 2008 2:23 PM
Subject: RE: [aprssig] An Empiracal Analysis: 6 meter APRS or meteorscater?


> > I would think a slower but improved C/N protocol,
> > e.g. WSJT, should cut the power requirements and
> > get through the local noise...thoughts?
>
> But needs an SSB transceiver ($1000) instead of the cheap if not
> free low-band VHR radios that are hitting the streets...
>
> No question that there are better ways to do it.  Problem is, in
> ham radio, unless it is free or cheap, there is never much of a
> following to make new great things work on a large scale.  But
> if WSJT can show improvement with FM radios, then it is worth
> looking into I guess.
>
> Bob, WB4APR
>
>
>
> > ----- Original Message -----
> > From: "Ev Tupis" <w2ev at yahoo.com>
> > To: "TAPR APRS Mailing List" <aprssig at lists.tapr.org>
> > Sent: Thursday, January 24, 2008 8:18 AM
> > Subject: [aprssig] An Empiracal Analysis: 6 meter APRS or
> > meteorscater?
> >
> >
> > > Ok, now we're cookin' with gas.  Here's what 'ya got to work
> with...
> > >
> > > Bob, I've taken the information that you found on the web
> > about several
> > (commercial?) meteor-scatter stations that seem to operate
> > successfully and
> > re-presented the data in chart format for easier comparison.
> > >
> > >
> > > Freq  Pwr    Antenna Data  Msg.  RX    DX to  Success  Rate
> > >              Gain    Rate  Size  Stns  RX stn Min/hr Max/hr
> > > (MHz) (W)    (dBd)  (kbd)  (b)   (#)   (mi)   (full
> deliveries)
> > > ----- ----   -----   ----  ----  ---  -----   ----    ----
> > >
> > > 38     200   10+10      2   150    1    600     18      46
> > > 38     400   10+10      2    50    1    500     15      60
> > > 38     400   10+10           50    1   1000      8      30
> > > 38     600    2+10      2   130    4    600    360    1200
> > > 38    2000    6+12          130       4-900     75     240
> > > 46     750    0+11      2                       12      30
> (June)
> > >
> > > The questions are many, but this can serve as a first step
> > to know what
> > has been successful in the past so as to know what to
> > engineer for future
> > duplication in the Amateur service.
> > >
> > > I have what I hope to be constructive input...but will
> > share a bit later
> > in the day.
> > >
> > > Kind regards,
> > > Ev, W2EV
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > ______________________________________________________________
> > ______________
> > ________
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> > >
> > > _______________________________________________
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> > > aprssig at lists.tapr.org
> > > https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
> > >
> > >
> > >
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> >
> >
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> >
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