[GreenKeys] Updated news feeds

Tue Oct 6 20:46:35 EDT 2026

Thanks! I continued the AI QSO a bit to include methods of evaluating
demodulators with impaired signals. It is at
https://share.google/aimode/ExbVZ10b7QaZzv5k2

I previously did a TU comparison ( https://w6iwi.org/rtty/TuComparison/ )
but want to do an RY count with impaired signals as described in the AI
QSO. The DSP TU has a command to display the number of Rs and Ys received
so I can tell how it is doing, but I need an interface to other terminal
units so a desktop computer can count the Rs and Ys.

What are people using as a 60 mA loop to PC interface?

Thanks!

Harold

On Tue, October 6, 2026 5:22 pm, Dale Hughes wrote:
> Hi Harold,
>
>
> Many thanks for the update and I have tried the NPR and CNN HTTP  access
> and it works fine with my demodulator and M28 TTY.
>
> Regards
> Dale VK1DSH
>
>
>
> On Wed, 7 Oct 2026 at 09:39, Harold Hallikainen via GreenKeys <
> greenkeys at mailman.qth.net> wrote:
>
>> Thanks to K8WXQ, I've found that not all UARTS will accept 1.0 stop
>> bits. I THOUGHT that setting the number of stop bits to 1.5 only affect
>> the transmit side and that, for example, a UART receiving 60 wpm would
>> sample the stop bit 22 ms after the sampling of the last data bit, and
>> then go into the idle condition. This appears to be how
>> electromechanical Teletypes work, but apparently not the UART in the AEA
>> PK232. On SOME of
>> my feeds, I had only been sending 1.0 stop bits. I have changed them all
>>  to 1.5 stop bits (and the new audio files will be generated over the
>> next few hours).
>>
>> To simplify streaming to the DSP TU WiFi module (
>> https://w6iwi.org/rtty/DspTU3/ ), I've taken several approaches which
>> still maintain compatibility with web browsers. These are:
>>
>> 1. Audio is sent as 8 bit unsigned PCM with a sample rate of 8 ksps.
>> This
>> eliminates the need for an MP3 or other decoder.
>>
>> 2. I've changed the code that determines which audio file to send (the
>> latest). Previously, it sent an HTTP redirect to the browser with the
>> URL
>> for the most recent WAV file. But that requires the HTTP client to
>> understand a redirect. Now, latest.php finds the latest file and sends
>> it directly with no redirect.
>>
>> 3. While the audio is available encrypted (https), it is also available
>> as plaintext (http). This removes the requirement that the web client
>> know how to do key exchange and decrypt the audio.
>>
>> Here are links to players for each of the news feeds:
>> https://w6iwi.org/rtty/audio/npr/
>> https://w6iwi.org/rtty/audio/csm/
>> https://w6iwi.org/rtty/audio/cnn/
>>
>>
>> Here are links to the latest audio files using https
>>
>>
>> NPR
>> https://w6iwi.org/rtty/audio/npr/audio/60wpm/latest.php
>> https://w6iwi.org/rtty/audio/npr/audio/60autostart/latest.php
>> https://w6iwi.org/rtty/audio/npr/audio/100wpm/latest.php
>> https://w6iwi.org/rtty/audio/npr/audio/100autostart/latest.php
>>
>>
>> CSM
>> https://w6iwi.org/rtty/audio/csm/audio/60wpm/latest.php
>> https://w6iwi.org/rtty/audio/csm/audio/60autostart/latest.php
>> https://w6iwi.org/rtty/audio/csm/audio/100wpm/latest.php
>> https://w6iwi.org/rtty/audio/csm/audio/100autostart/latest.php
>>
>>
>> CNN
>> https://w6iwi.org/rtty/audio/cnn/audio/60wpm/latest.php
>> https://w6iwi.org/rtty/audio/cnn/audio/60autostart/latest.php
>> https://w6iwi.org/rtty/audio/cnn/audio/100wpm/latest.php
>> https://w6iwi.org/rtty/audio/cnn/audio/100autostart/latest.php
>>
>>
>> Here are links to the latest audio files using http
>>
>>
>> NPR
>> http://plaintext.w6iwi.org/rtty/audio/npr/audio/60wpm/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/npr/audio/60autostart/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/npr/audio/100wpm/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/npr/audio/100autostart/latest.php
>>
>>
>> CSM
>> http://plaintext.w6iwi.org/rtty/audio/csm/audio/60wpm/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/csm/audio/60autostart/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/csm/audio/100wpm/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/csm/audio/100autostart/latest.php
>>
>>
>> CNN
>> http://plaintext.w6iwi.org/rtty/audio/cnn/audio/60wpm/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/cnn/audio/60autostart/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/cnn/audio/100wpm/latest.php
>> http://plaintext.w6iwi.org/rtty/audio/cnn/audio/100autostart/latest.php
>>
>>
>> As mentioned before, I thought UARTs would accept 1.0 stop bits even
>> when configured for 1.5 stop bits. I had a nice AI QSO where it was
>> explained how these UARTs did indeed need 1.5 stop bits. It's at
>> https://share.google/aimode/KBLmTX7w2kDNuCh8u .
>>
>>
>> Please let me know of any issues with the feeds.
>>
>>
>> THANKS!
>>
>>
>> Harold
>> https://w6iwi.org
>>
>>
>>
>>
>>
>>
>>
>> --
>> Not sent from an iPhone.
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