[aprssig] APRS-WSPR APRS from anywhere!

Earl Needham earl.kd5xb at gmail.com
Mon Oct 10 09:42:33 CDT 2016


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
KD5XB

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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>
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