[GreenKeys] Model 20 Teletype available

[David I. Emery]

On Fri, Jan 09, 2009 at 11:10:09PM -0800, Bill Buzbee wrote:
> I'm under the impression that most AP & UPI radio station services used
> Model 15s - no need for upper/lower case, paper tape or typesetting if you
> are reading the copy over the air.

	Back in the TTY era ALL the AP and UPI radio/TV wires I ever was
familiar with were baudot upper case only - mostly on model 15s until
the Extel printer era...

	Most of the AP's primary newspaper "A" wire and quite a few of
the state and regional circuits were at one point in the late 60s to
early 70s in 6 level TTS as were sports score and stock feeds.   UPI kept
more of these in baudot 5 level format.  Newspapers of course had model
20s to print copy as well as tape punches to feed the Linotypes.
	
	By the mid 70s both wire services began also distributing
newspaper wire copy in ASCII over "high speed" 1200 baud FSk circuits...
in upper and lower case ... for use with the early computerized copy
editing and composition systems then coming into use.   This was never
as far as I know in  linotype ready format ... unlike TTS feeds which
were.

	I don't know when the last TTS wires were finally shut down,
I would guess the 80s some time... but by that time the folks I knew 
who worked on SW for this had moved on so my info is less complete.

-- 
  Dave Emery N1PRE/AE, die at dieconsulting.com  DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in 
celebration of what could have been, but wasn't and is not to be now either."