[aprssig] APRS-WSPR APRS from anywhere!

Robert Bruninga bruninga at usna.edu
Mon Oct 10 18:48:19 CDT 2016

Good point.  APRS WSPR would be like most APRS bulletins and status..
Directed to ALL.
But I think I will work on a simply possible QSO token.  A sender asking
for a reply would include a QSO token in his message and then the resposner
could use that token instead of a full call.


On Mon, Oct 10, 2016 at 1:52 PM, crvickru <crvickru at lakeheadu.ca> wrote:

> I am currious about the messaging aspect of this technique. How would yoy
> encode the destination of the message?
> Sent from my Samsung Galaxy smartphone.
> -------- Original message --------
> From: Earl Needham <earl.kd5xb at gmail.com>
> Date: 2016-10-10 10:42 AM (GMT-05:00)
> To: Robert Bruninga <bruninga at usna.edu>
> Cc: TAPR APRS Mailing List <aprssig at tapr.org>
> Subject: Re: [aprssig] APRS-WSPR APRS from anywhere!
> For many years, I've suggested using high speed CW.  You could then use
> just about any amateur radio frequency.  WSPR might have better decode, but
> CW is the "old stand by".
> Vy 7 3
> Earl
> On Sun, Oct 9, 2016 at 1:20 PM, Robert Bruninga <bruninga at usna.edu> wrote:
>> The more I think about it the more I get excited about building up an
>> APRS-WSPR Gateway system.  With the 27 dB signal processing gain of WSPR,
>> then a 1W transmitter is the same as 1000 watts.  And for receive, since
>> APRS can have HF receivers everywhere, then this can really expand the
>> usefulness of APRS anywhere in the world including on the fringes of our
>> existing network.
>> QST in September showed the $29 TAPR WSPR daughter board that plugs onto
>> a Rasberry pi and although it is only a 100 millliwatt transmitter, with
>> enough WSPRgates, that should not be a problem.  But adding a 1W PA will
>> always help!
>> I already have come up with a compression technique that can improve on
>> the existing gridsquare (60x120miles) down to (18x12miles) and down to 3
>> miles or nearly a half mile for 5 and 4 letter calls.
>> see http://aprs.org/aprs-wspr.html
>> Lets get those WSPR boards on the air!
>> Bob, WB4APR
>> _______________________________________________
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>> aprssig at tapr.org
>> http://www.tapr.org/mailman/listinfo/aprssig
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