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20160214 WSPR Stand-Alone Beacon

posted Feb 15, 2016, 6:11 AM by Bob Bristow


A Request From Richard VK6TT

Recently I became interested in the WSPR protocol. As I learned more
about how it worked I came to understand the brilliance of the man
behind the protocol, Nobel Prize winning physicist Joe Taylor K1JT.
The homepage for WSPR where you can learn a lot more is the WSJT
Homepage

As I played with the protocol I started to see some irony in the
transmission side of the protocol. The PC used to generate the audio
tones used to modulate the 0.1 to 5 watt transmission might itself use
+100W of energy.  However, the PC is needed to get the synchronised
timing underlying the protocol. Transmission starts at 1 second into
an even minute. As the clock drifts in time your transmission might
not be decoded by the receiver so it's all been for nothing.

After considerable effort I came up with a low energy solution to
running a WSPR beacon.  And that's important to me. The idea of
leaving a PC running to generate a beacon when I'm not in the shack is
just wasteful. And I hate waste.

However, I simply can't manufacture the bare board myself. It is the
most time consuming part of the exercise. So if there is enough
interest I can get boards made commercially. For $40 you get a
complete WSPR beacon generator and a GPS with aerial for time
synchronisation. All you have to do is box it for outdoor
installation, supply power and pipe the audio and PTT control into the
shack.

If you would like more information about a fully functioning WSPR
beacon generator please contact Richard, VK6TT@burden.id.au.

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