[GreenKeys] Teletype and electronics........

[COURYHOUSE at aol.com]

back on my computer and terminal business  days I bought and sold  a lot of 
GE TermiNets.
I was even lucky enough to have the ASR  desk   with the  punch in one 
drawer and the reader in the other drawer ...I  loved  it... the  reader  would  
read  tapes at  300 baud  instead of  110 baud. had it hooked to my  PDP-8 
 
TermiNet 300s actually had  3  sub models  ...   the  boards used some 
pretty unique  chips especially on the early  ones!
 
I remember  when I  got the first   Terminet  1200   1200 baud!    
Wheee!!!!!!  
 
Ed#   www,smecc.org    
 
 
 
At  one point  we  had a teletype model 40 printer   too  only  one... it  
was neat  and  sold  rather  quickly so I never  got too much time to play 
with it. 
 
 
In a message dated 4/9/2013 2:22:04 P.M. US Mountain Standard Time,  
jhhaynes at earthlink.net writes:


I  for one was glad to see the item about an electronic keyboard.

On Tue,  9 Apr 2013, Linger, Mike wrote:
> ELECTRONICS, including the Teletype  model 40 which is all electronics and
> for the most part I consider it  junk, but I know some people like it.
> 
Sadly, all the Model 40s  seem to be inoperative because the type carrier
belts have all turned to  crumbs.  In its day it was quite a piece of work.
The idea goes back  to the IBM 1403 line printer of the late 1950s attached
to the 1401  computer with its magnetic core memory.  Quite a step forward
in  complexity compared with the drum printers of its day.  Then the  idea
was used again in the G.E. Termi-Net 300 and 1200 machines about  1968,
with implementaton in custom MOS ICs.  It's sad that the  Termi-Net 
printers are so little known; quite an interesting machine  coming out of
a company that had never built anything like it before, nor  since.
And then the Model 40 printer took Teletype into the in-house  manufacture
of MOS ICs.  But used mechanical principles to get most of  the hammer
force from the motor rather than from the electronic  circuits.

Teletype was remarkably successfuly at getting into the IC  business
in-house; although it's very questionable whether it was a good  strategic
direction for the company.  Back when ICs were new  technology I worked
only a couple of desks away from the young engineer who  went on to become
the designer of the Model 40 printer  logic.
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