[GreenKeys] Model 20 data timing

[Sheldon Daitch]

 I am going to rely on a 45 year old memory, but I am thinking that the Model 15 andModel 20 machines used by the Associated Press in North Carolina had the same main shaft and motor gears.
I think it was done this way so that if we had a motor failure, we'd just swap a motor and not have to worry was it a M-15 or M-20.
Other wire services or even other states in the AP network might have had differentgears between the machines.
That would suggest the baud rate might have been slightly higher on the six levelcircuits.    
I am also thinking that the range on the range finder was slightly smaller on theM-20s than on the M-15s.
On the other hand, I might have a bad memory.


Sheldon
    On Saturday, August 12, 2023 at 06:20:54 PM EDT, Mike Douglas via GreenKeys <greenkeys at mailman.qth.net> wrote:  
 
 The Model 20 is a Model 15 modified to use a six bit code instead of a five bit code (supports upper and lower case letters). Does anyone know if the bit timing remained 22ms/bit (45.5 baud) and the WPM rating dropped, or did it run at a faster baud rate?

Mike
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