hello Chris, Jim, group,
an alternative to a transverted would be a divider, let's say from 5MHz (from a
HF tranceiver) to 500kHz.
That would limit the hardware to some resistors an a single CMOS or TTL IC.
I have written a small apllication that generates the appropriate WSPR audio
signal based on the input frequency, output frequency and divider ratio.
It worked fine for some local tests, but due to lack of I did no real "DX
tests" so.
But if anyone wants to try this route I will be happy to send the software.
73, Rik ON7YD - OR7T
________________________________________
Van: [email protected] [[email protected]]
namens James Moritz [[email protected]]
Verzonden: woensdag 7 april 2010 15:09
Aan: [email protected]
Onderwerp: Re: LF: WSPR without an SSB TRX ?
Dear Chris, Andy, LF Group,
What Andy suggests is fine for generating a WSPR signal, but receiving WSPR
via the PIC might be a bit more difficult...
But also at http://www.g4jnt.com/LFUpconv.pdf is Andy's simple phasing
up-converter, which could be used to convert a PC audio output to 500kHz and
be used in place of the VCO in your TX.
Trawling through the Forum topics on the WSPRnet.org website (you might have
to sign up to see all the material) will reveal many designs for homebrew HF
WSPR beacons that could mostly be adapted to 500k.
Cheers, Jim Moritz
73 de M0BMU
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