[GreenKeys] Looking for Alternative Method of Receiving Internet Broadcast of TTY Modem Tones

[David Potter]

Ive always used an old laptop with my FSK-500 rtty demodulator to my model
19 and works great.
David KA5IXE

On Sun, Oct 4, 2026, 8:09 PM Harold Hallikainen via GreenKeys <
greenkeys at mailman.qth.net> wrote:

>
>
> On Sun, October 4, 2026 9:30 am, Paul Newland, ad7i via GreenKeys wrote:
>
> > Harold, W6IWI told how to just download a PCM wave file with the latest
> > info from his news servers.  I'm guessing it would be possible to also
> > post the text file for the content that was used to generate the WAV
> file,
> > and bypass the modem part, although the modem tones playing softly in the
> > shack as the printer runs is part of the ambiance of RTTY.
> >
>
> The news feeds are pulled from the sources (NPR, CNN, CSM) every couple
> hours. The articles articles are reformatted to clean ASCII (including
> word wrap). This is then converted to baudot with the msb set if the
> character is in the figs set and clear if it is in the ltrs character set.
> Currently the required figs and ltrs are inserted in the software uart
> that drives the dds tone generator. I COULD move that conversion to
> earlier so there is a ready to print baudot file.
>
> As noted earlier, the audio is a large PCM audio file with 8 bits per
> sample (unsigned) at 8,000 samples per second. latest.php sends a redirect
> to the browser to point to the latest wav file. For NPR, there is
> latestt.php, which is experimental. It directly returns the WAV file
> instead of doing a redirect. Finally, the subdomain plaintext.w6iwi.org
> allows for unencrypted transfers. Unencrypted PCM SHOULD make the client
> software (an http client) pretty simple.
>
> Harold
> https://w6iwi.org
>
>
>
>
> --
> Not sent from an iPhone.
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