As I understand it, hams had to get permission from the FCC to use
FSK. They originally tried it with on-off keying, like CW, but it
didn't work very well.
73, doug
From: W0YR@aol.com
Date: Sat, 24 Jan 2004 18:46:30 EST
There was a story in QST within the past 18 months about a ham who
"invented"
the walkie talkie. He also developed a system to transmit teletype signals
over radio. He invented a lot of other things, too. I am sorry I can't
remember his name or call. I do recall that his picture was shown along
with the
QST story. Radio-teletype was not developed for amateur use. Later,
amateurs
(once the FCC okayed FSK transmission) adapted the FSK techniques.
Others have correctly written that the first amateur uses of FSK involved
850
Hz shift.
If anyone has access to the December QST issues of recent years, he might
look in the index and find the article. It's worth reading and I wish I
had
saved it.
73
Mike
W0YR
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|