[GreenKeys] [AWA] We have this Model 31 Teletype and need the control box...

[COURYHOUSE at aol.com]

Duncan  - whereas  the    TU  has  the   send  recv  lights in this  
article also  note   on  your  unit the send  recv  lights are  on  the tty......
 
or maybe  by the time it all actually flew in any quality    there  were   
lights on both!?  Ed#
 
 

 

 
In a message dated 11/14/2013 12:27:51 P.M. Mountain Standard Time,  
duncanancy at earthlink.net writes:

Ed,  

The picture in the Tele-Tech article may have been a mock-up just for  the 
magazine article, as it was written many months before the M31 manual  (Bul. 
200) came out and a couple years before M31 production started.   

According to the Teletype Corp. Museum books, there were 500 M31s  
produced, between 1949 & 1959. There may have been very few of the AFSK  converters 
made.  The AN/AGA-1 spec sheet (http://www.virhistory.com/navy/rtty-tu.htm)  
I sent you does not list a manual number for the TT-31/AGA-1 (the AFSK  
converter).  The manual listed for the TT-30/AGA-1 (the M31 printer) is  listed 
as "80MA" which just the Teletype Corp. Bulletin 200, M31 manual with a  
one sheet cover page.

Most military RTTY used a 20 ma loop. The 60 ma  loop was a left over from 
the telegraph days and when a telegraph or "printing  telegraph" had to 
drive many miles of wire. Most Teletype Corp. M14, 15, &  19 machines would only 
run on 60ma, so hams were required to stay with the old  60 ma standard.  
If you have a TTY only a few feet from the radio, a 20ma  loop is sufficient 
& doesn't require as much power.

have  fun,

Duncan
K2OEQ

On 14-Nov-13 12:10, _COURYHOUSE at aol.com_ (mailto:COURYHOUSE at aol.com)  wrote:


Duncan - we have our eyes out   for a case  for  yours.   your military 
model  needs   the  proper holes in it  for the lights  etc  that  are  unique 
to that military model.  
 
Question is though  re: photo in this  article....was  this  control/AFSK  
unit issued to the military or   just  offered  as a  commercial  item?   If 
 military  there  should be a manual we can get hold   of that will  
provide a wealth of  knowledge.
 
In the  article  it is clearly the commercial  version  of the Model 31  
being shown...
 
another thing  notice they mention   this  being a  20 mil loop   on the  
commercial one... glad to learn that  before I lit  mine off... Our  
commercial one  belonged   orig  to John  Sheets then George Hutchinson then  us.
 
One  thing  of  note... there was a large offering of  these machines  to 
HAMs... but  since they were tape  printers   did not  get as much  love as 
the page   printers... like the model 15 the  good thing?  these things  are  
small enough they  my  be  lodged under   workbenches and in out of the way 
places  still
 
at  SMECC we are trying to    figure out  how  many of these are  still 
around  so If  you  have   one  or know   of some one  lets  get a  count.....  
 drop note to _info at smecc.org_ (mailto:info at smecc.org)  
 
many thanks  Ed Sharpe Archivist  for SMECC - Arizona's   Communications 
and computation museum 
_www.smecc.org_ (http://www.smecc.org/) 
 
 





 
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