Satellite fax to HF fax converter

Satellite fax to HF fax converter

Post by John Boudre » Fri, 08 Jul 1994 02:06:18

Has anyone ever built a converter to change the AM wefax from NOAA
satellites to FM wefax for reception with an HF fax demodulator?
Is it possible?  I'd like to be able to receive satellite photos
direct from the satellites but don't want to spend another $XXX
to buy a satellite wefax demodulator.  I've found that by carefully
tuning the signal from the satellite in SSB with a very narrow
bandwidth I can copy the pictures a little bit but doppler shift
makes this process very difficult.  It would be much easier to
receive the signal in FM from the satellite and convert the audio
tone's amplitude modulations to frequency modulation and feed it
to my HFFAX demodulator.
Alternately, is there software available to do the same thing with
a simple interface?
Thanks,
John - VE8EV

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Satellite fax to HF fax converter

Post by W.F.Schroed » Sat, 09 Jul 1994 16:40:47



Quote:>Has anyone ever built a converter to change the AM wefax from NOAA
>satellites to FM wefax for reception with an HF fax demodulator?

[stuff deleted]

There was a circuit for an AM/FM converter in the german packet
mailboxes for reception of satellite pictures.  It was used as a
frontend to the HamComm interface and JVFAX.  The design is based on an
XR2206.  If there is interest, i'll try to dig it up.  Be warned, the
circuit description and alignment procedure is written in german.

73 Django
DL5YEC

 
 
 

Satellite fax to HF fax converter

Post by W.F.Schroed » Sat, 09 Jul 1994 18:45:53


Quote:>Has anyone ever built a converter to change the AM wefax from NOAA
>satellites to FM wefax for reception with an HF fax demodulator?

[stuff deleted]

There was a circuit for an AM/FM converter in the german packet
mailboxes for reception of satellite pictures.  It was used as a
frontend to the HamComm interface and JVFAX.  The design is based on an
XR2206.  If there is interest, i'll try to dig it up.  Be warned, the
circuit description and alignment procedure is written in german.

73 Django
DL5YEC