[GreenKeys] Fw: Re: Teletype and electronics........

Thu Apr 11 13:21:19 EDT 2013

Back when was in the computer Biz we ended up with all the 33s that came  
off the Phx Union HS hp-2000 system. they had started with a hp-2000A drum 
based  storage stem in 69 or 70 They had the longest running timeshare system 
for HS  instruction in the state... the 33s were pretty worn but had been 
maintained but  by that point in history there was not much sale for them they 
were sold cheaply  to make some floor room as I think we had gotten 20 of 
them. I wonder if thee  were some in the batch that were the orig issue ones 
when though had the first  iteration of the 2000 system? nothing harder on a 
tty then students!

The BEST thing about these units were the clamp on wheel things   or  set 
in     thingie platform dolly that   came  with each and every  one of them!

Ed # www.smecc.org

.org

In a message dated 4/11/2013 10:03:14 A.M. Mountain Standard Time,  
teletypeparts at aol.com writes:

Jim,

I worked on some of those 33's at Dartmouth College.  It was  called the 
Kiewit Computer System.  I got in on the last days of  it.  My supply of parts 
came from Kiewit in exchange for 5 service  calls.  Most of the parts were 
levers and stuff you would never use,  but initially there were a lot of 
good parts as well.  

Its seems like one of the professors there had something to do with  early 
computers or ASCII or something like that but darned if I can  remember.  
The Kiewit machines had acoustic couplers in them for  dialing into the 
mainframe with a standard phone. 

Also worked on a lot of 33's at the medical school where they used 33's  on 
blood testing machines, scintillation counters and the like.  They  had 
motor control units to turn them on as they only printed once ever 10  minute 
or so to print the test results of one sample.  There were about  15 33's at 
the school as I recall.  

All this was in the 1980's.  

73,

Wayne 
KB1FDW

-----Original  Message-----
From: Jim Haynes <jhhaynes at earthlink.net>
To: Peter  Gottlieb <nerd at verizon.net>
Cc: greenkeys  <greenkeys at mailman.qth.net>
Sent: Thu, Apr 11, 2013 12:13  pm
Subject: Re: [GreenKeys] Fw: Re: Teletype and  electronics........

On Thu, 11 Apr 2013, Peter Gottlieb wrote: 
 > Western Union.  The 33, despite being a lot cheaper in construction than 
the 
 > 28 or even the 35, still gave me probably into the thousands of hours of 
 > service with only minimal maintenance.  I did tons of coding on it, ran

 The original market intended for the 32/33 line was TELEX/TWX service
 in business offices where the machine didn't get much use.  Two hours
 a day was frequently mentioned.

 Then the minicomputer business happened, especially in the era of cheap
 integrated circuits.  The 33 was a natural choice to go with a 
 minicomputer because it was the cheapest thing out there with a keyboard
 and printer and paper tape punch and reader to take care of the minimal
 I/O needs of the machine.  So the Model 33s were suddently being run
 24/7.  (And Burroughs even chose a 33 for the console device on their
 B5500 mainframe, replacing a modified electric typewriter.  But except
 for having the motor running 24/7 the 33 on the B5500 didn't get heavy
 use - just job start and stop messages and taking commands from the
 operator.)

 So one could argue that the M33 went a long way to making the minicomputer
 affordable for a lot of applications where a better terminal would have
 priced it out of the market.  And then when time sharing came along with
 the Dartmouth system, and later with time sharing on minicomputers, the
 M33 was again the most economical terminal for the job.

 It is said that Teletype was planning to use felt clutches in the 32/33
 line but was persuaded by Western Union to adapt the Model 28 style all-
 metal clutches.  That went a long way to reducing the maintenance
 requirements.

 I once heard a talk given by one of the principal designers of the 32/33
 line, early in its product life.  He referred to an editorial in a
 mechanical design engineering magazine of the period.  The editor had
 been invited by the U.S. Army to view some of the after World War II
 tests of German V-2 rockets at White Sands Proving Ground.  He was duly
 impressed with the intense light and heat evident in the rocket exhaust,
 and asked one of the German engineers near him what material the engine
 was made of.  "Stahl, eisen stahl" (steel, iron steel) was the reply.
 He expressed his amazement that ordinary steel could stand up to the
 tremendous heat.  The German's explanation was, "Drei minuten."  Three
 minutes - that's how long the engine had to last.  So "Drei minuten"
 became a motto for the Model 32/33 designers.

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