[GreenKeys] Done lurking; Teletype model 33 KSR/ASR restoration

Tue Aug 4 12:00:01 EDT 2015

-Great  projects   Jeff! good to have another person in AZ  interested in 
the  old  computer stuff

-I think there was also a  33 wiring diagrams     set  of  small prints 
that  would complement    the  manuals/

-20 ma  on crt  termainals.   Yes  there were a  number for them that 
offered  this  as an interface method in those  'early days'

- are  you going to finish building the Altair!?

Ed Sharpe archivist  for SMECC   _www.smecc.org_ (http://www.smecc.org)  

In a message dated 8/4/2015 8:26:45 A.M. US Mountain Standard Time,  
jeffa at rodaw.com writes:

Hi, 
I’ve been reading the list for several weeks. Now that I’ve  retrieved my 
teletype model 33 KSR left behind in storage when I moved from  Spokane, Wa. 
to Mesa, Az. I’m ready to get to work restoring what was once my  father’s 
I/O for an Imsai 8080 S-100 computer. I remember playing  startrek(.bas) on 
it. I also picked up an ASR as I’m really wanting the paper  punch/reader 
lacking in our old KSR. My interest in the Model 33s is for  display with my 
late 70s early 80s computers. I still have Dad’s unfinished  Altair kit, I’
ve recently rebuilt the power supply in his Imsai and I’ve got  my old 
CompuPro up and running MP/M 8-16. 
FWIW I recently picked up a Hazeltine 1500 serial terminal.  It’s 
interesting in that it can be configured for current loop. Maybe handy  for testing. 
I’ve got a page started with some pictures and restoration  notes. 
http://retrowagon.org/wiki/index.php/Teletype_Model_33_SN_xyz  (Shortened: 
http://rodaw.me/1dAG4z3 ) 
I have three Teletype technical manuals. I’m currently  reading Volume I “
General Description and Principles of  Operation” 
Hoping to find something obvious. Otherwise is there anyone  in the Phoenix 
area that might be able to help me repair this? Or does repair  work? Or if 
not local are there any people still doing repair that I could  ship or 
deliver this to? 
So far they both power up, motors running but in hopefully  local mode I 
get nothing when depressing the keys. The innards don’t appear to  be very 
gummy. The ASR seems newer than the KSR judging by the look of the  circuit 
boards and components. The KSR is missing the modem which I understand  would 
have been located in the base. 
I’m looking for some  
-           Paper tape for the ASR.  
-           Couple type wheel hammer pads. 
-           Cover plate that goes under rotary dial with holes for  
buttons. 
-           Volume control knob. 
Is this greenkeys list archived and indexed anywhere  suitable for 
searching? I found this http://www.rtty.com/greenkeys.htm  but the search cgi is 
broken. 
Has anyone written a troubleshooting guide for the Model  33? Good blog 
post or ?? 
Thanks for reading.  
-           jeffa 

Jeff Albrecht KF7CRU 

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