[GreenKeys] CRLF or not CRLF?

[Duncan Brown]

On 30-Jul-17 16:04, Richard Knoppow wrote:
>    I have been following this discussion with great interest. I also 
> read over some patents for automatic CR-LF. I wonder how this was 
> handled on radio circuits to avoid having two CR-LF at the printing 
> machine. Of course I have been aware that many machines were set up 
> for automatic CR-LF but until now had not thought about how it 
> actually worked and some of the problems created by it.
>
Most commercial & military messaging (land line & radio) was done from 
tape.  All (?) perforators have a character counter with a bell and/or 
light that turns on after about 70 characters so that the typist knows 
to enter the CR-LF characters.

The automatic CR-LF at the end of the line on a page printer was only 
needed on RTTY circuits in case the CR-LF characters were lost in a fade 
or QRM.

Have fun,

Duncan
K2OEQ


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