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

[Brooke Clarke]

Hi Charles:

Where can I get "Printing Telegraphy A New Era Begins"?

The information you provided connects two areas I've studied.

The Stock Quotation printers use a typewheel and print on strips of paper.
http://www.prc68.com/I/Telegraph.shtml#TT
A typewheel printer will be lighter than a type bar printer.  But I expect that 
Teletype would have entered their typewheel machine, like the 5A, see:
http://www.prc68.com/I/WU5A.shtml  The 5A is made like a tank for use during 
every minute the stock exchange was open.  My guess is that it was much heavier 
than the Kleinschmidt.

The PCC-1 system required a modification of the PRC-25 VHF low band radio in 
order to handle the bandwidth.  For details of what was changed and the before 
and after performance see: http://www.prc68.com/I/PRC25.shtml#PCC1
The modification involved wiring wide band audio out and wide band audio in to 
a couple of unused pins on the POWER connector.  This modification defined what 
these two pins did.

When the PRC-77 came out it was designed to work with the KY-38 voice 
encryption unit and used those same pins for the same functions that way it 
could also be used with the PCC-1
http://www.prc68.com/I/PRC77.shtml#Crypto
http://www.prc68.com/I/KY38.shtml

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam


Charles Coulter2 wrote:
> 
> ----- Original Message ----- From: "Charles Coulter2" 
> <charlana2 at embarqmail.com>
> To: <WA5CAB at cs.com>
> Sent: Monday, December 10, 2007 8:59 AM
> Subject: Re: [GreenKeys] History question - Model 26 in military service?
> 
> 
>> From "Printing Telegraphy Anew Era Begins" written by Edward E. 
>> Kleinschmidt Sr.
>>
>> "In February of 1944, Edward E. Kleinschmidt demonstrated a working 
>> model of his teleprinter in Washington at the office of the Chef 
>> Signal Officer. Officials of the Signal Corps were greatly interested 
>> in the unit, not only because of its extrememlightness and small bulk, 
>> but because of the representations that the basic design features of 
>> the tape printer, exclusive of the printing mechanism, could be 
>> incorporated in a page type printer which could be constructed with a 
>> total weight of approximatly thirty pounds."
>> The informal tests were very successful and "Kleinschmidt Labs" was 
>> asked to prepare plans toward a tactical light-weight printer for 
>> field use. Back to quote. "Edward F. joined his father in furthur 
>> engineering and development work, and models of a typebar page printer 
>> and a typewheel page printer to operate at 60 WPM were built. Upon 
>> evaluateion by the Signal Corps and Army engineers, a printer with a 
>> higher operating speed, up to 100 words per minute, was demanded. This 
>> requirement meant a complete redesigh of the apparatus, but it was 
>> successfully carried through and experimintal models were submitted by 
>> both companies. Therupon both Kleinschmidt (Labs) and Teletype were 
>> asked to build ten printers for field tests. This was done, and after 
>> extensive field testing, the Kleinschmidt-designed, keyboard operated, 
>> 100 WPM typebar page printer was accepted, and by order of the then 
>> Secretary of War it was made the standard for the Military, effective 
>> on January 1, 1949. (This printer was later to be known as the TT-4 
>> tactical page printer, the principal component of Teletypwriter Set 
>> AN/PCG-1"
>>
>> Kleinschmidt Laboratories was off and running.
>>
>> Lots more teletype history in Edward Kleinsmidt's book.
>>
>> Charles Coulter K9MZN