[GreenKeys] Model 20

[Brooke Clarke]

Hi Larry:

It has both upper and lower case characters (tele type setting).
http://en.wikipedia.org/wiki/Teleprinter

Have Fun,

Brooke Clarke, N6GCE
http://www.PRC68.com
http://www.precisionclock.com



Larry Tighe wrote:
> Howdy Folks,
> 
> I'm reading a description of the Model 20 and it sez the machine uses a 
> 6 unit code.
> 
> The description of the Model 15 is 5 unit code.  The machines look 
> identical from the outside and inside.
> 
> What was the purpose of a 6 bit code machine?
> 
> 
> Larry
> www.antiquetelephone.com
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