[GreenKeys] RTTY (and SSB) in WW2

[Harold Hallikainen]

On Sun, October 17, 2021 10:32 am, Nick England wrote:
> An interesting an informative article is here
> "Military Teletypewriter Systems of World War II"
> https://www.nonstopsystems.com/radio/pdf-hell/article-AIEE-1948.pdf
>
> Nick England K4NYW
> www.navy-radio.com

Thanks for posting! An interesting idea is on pdf page 8. They transmitted
two mark tones and two space tones on an SSB transmitter to get frequency
diversity.

Harold
https://w6iwi.org