[GreenKeys] RTTY Art

[Roy Morgan]

At 03:15 PM 12/5/2004, John Foust wrote:

>I have some images only in paper form, ...
>I've been wondering lately if audio recording of radio
>signals might not be a good exchange format.

John,

I read last night (in the RTTY handbook, the one that's 8-1/2 by 11 inches 
in size and has a blue cover) that audio tape recording is doomed to dismal 
failure. The problem is speed control.

Professional film sound recording systems have an extra track with a pilot 
tone on the tape, crystal tone generators at the recorder, and servo 
systems to correct the speed of playback for synchronizing.  Almost any 
tape recorder you have will wander enough to drift the tones outside the 
terminal unit's ability to follow it.

Maybe modern sound card tty capture programs will follow a drifting 
signal.. If so, wonderful then it will work very well.

Roy


- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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