[GreenKeys] Colossus FSK challenge

[Nick England]

Russ WA3FRP was the first to identify the signals as 450 shift, 50 baud
from a German weather station. I think it is great that these folks at
Bletchley Park are STILL intercepting German RTTY with their original WW2
RCA AR-88 receivers! There are a number of fascinating videos on YouTube
about Bletchley Park, German encrypted RTTY (Tunny), and Colossus. If you
ever have a chance to visit, it is a truly wonderful experience.

Thanks to Russ, Daniel K6YIC, and Milt AD5XD for figuring out the signals.

And I got confirmation from the folks at Bletchley Park:
------------------------------
The National Museum of Computing, home of the Colossus rebuild, use a live
German weather beacon transmission in the Tunny gallery as an example of
radio teletype transmission.
When reception is particularly poor, we have a box with a two way switch
with two-tone teleprinter at one setting and morse at the other, for
demonstration to the visitors.
--------------------------------------
Cheers,
Nick

On Mon, Feb 15, 2021 at 9:11 PM Nick England <navy.radio at gmail.com> wrote:

> https://m.youtube.com/watch?v=QcaHpvznC7g
>
> I just came across this. Can anyone print the AFSK at the beginning of
> this video? It may be on-off keying.
> --
> Nick England K4NYW
> www.navy-radio.com
>
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