From: Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Date: Wed, 7 Apr 2010 15:23:40 +0200
Thread-Topic: LF: WSPR without an SSB TRX ?
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Message-ID: <BF4A524700075746A6467658DFC7102C19A043E52C@ICTS-S-EXC2-CA.luna.kuleuven.be>
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Subject: RE: LF: WSPR without an SSB TRX ?
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hello Chris, Jim, group,

an alternative to a transverted would be a divider, let's say from 5MHz (f=
rom 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 aud=
io 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: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.or=
g] namens James Moritz [james.moritz@btopenworld.com]
Verzonden: woensdag 7 april 2010 15:09
Aan: rsgb_lf_group@blacksheep.org
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 WSP=
R
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 ha=
ve
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