[GreenKeys] History question - Model 26 in military service?

[WA5CAB at cs.com]

John,

Goacher and Denny must be wrong based on information from several different 
directions.  TT-4/TG (Kleinschmidt), primary component of AN/PGC-1, came out 
circa 1951.  Had the M-26 been assigned US military nomenclature, it would have 
been TG-something, the system in use a decade and more earlier.  M-15, for 
example, is TG-7.  There is some controversy as to exactly when the JAN 
nomenclature system cranked up but 1942 is a good year to argue from.

Further, reusing the same basic component nomenclature (such as TT-4 or R-23) 
with different suffixes was never allowed.  A completely different TT-4 based 
on the M-26 wouldn't have appeared in 1940 or 1941 because (a) the 
nomenclature system wasn't in use that early, (b) the TT-1 didn't first appear until 
1944 or early 1945.

I can't imagine Teletype making new M-26's in 1949 to compete for the TT-4 
contract (that's about when such work would have been being done) when they must 
have been well into working on the M-28.

Anyway, it must be a typo.  The two pieces of equipment are 15 years apart.

In a message dated 12/9/2007 10:37:49 PM Central Standard Time, 
jhhaynes at earthlink.net writes: 
> Now I had always assumed that production of the Model 26 ceased
> at the onset of WW-II at the latest, and then production of spare
> parts ceased in the mid 1950s when lots of the machines started
> to be available to hams.
> 
> The RSGB Teleprinter Handbook by Goacher and Denny, 1st edition,
> has a small section on American machines and shows a military
> TT-4 which is plainly a Model 26 mechanism in a military housing.
> Another picture of a TT-4 is the Kleinschmidt machine well known
> as a TT-4.  So I'm wondering if Teletype made some Model 26 machinery
> for the military, possibly as a trial model competing against the
> Kleinschmidt, and then didn't get a contract or wasn't interested
> in getting a contract.
> 

Robert & Susan Downs - Houston
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