[GreenKeys] Fwd: NOS Model 28 tty

[Duncan Brown]

The mechanical TTYs were built to last and technology did not change as 
fast back then.

The Kleinschmidt Laboratories machines were used by the US Army from the 
early 1950 up into the 1990s. (Field Manual 24-19, 24 May 1991, "Radio 
Operator's Handbook" gives instructions for the AN/GRC-122/142, 
AN/GRC-26D, AN/GRC-46, AN/VSC-2, & AN/VSC-3 Radio Teletypewriter Sets. 
All of these units used the TT-4, TT-98 and/or TT-76 machines.) So the 
Army used these machines for about 40 years.

The Teletype Corp Model 15 (aka TG-7, TT-55, etc) went into production 
in about 1930. When I attended the US Army SE Signal Corps School at Ft 
Gordon in 1967, they were still teaching the Teletype Corp M15.

So 30-40 years of service is typical for the mechanical TTYs.

have fun,

Duncan, K2OEQ
USASA 31J30



On 08-Oct-18 12:24, Nick England wrote:
> Model 28 machines were installed aboard new USN ships built in 1987. 
> Still in use at least through 1992.
>
>
>     KB1FDW
>
>>     On October 8, 2018 at 10:25 AM Nick England <navy.radio at gmail.com
>>     <mailto:navy.radio at gmail.com>> wrote:
>>
>>
>>     ---------- Forwarded message ---------
>>     From: Ray Fantini < RAFANTINI at salisbury.edu
>>     <mailto:RAFANTINI at salisbury.edu>>
>>     Date: Mon, Oct 8, 2018 at 9:36 AM
>>     Subject: [MMRCG] Model 28 tty
>>     To: milsurplus < milsurplus at mailman.qth.net
>>     <mailto:milsurplus at mailman.qth.net>>, mrca < mrca at mailman.qth.net
>>     <mailto:mrca at mailman.qth.net>>, MMRCG at groups.io
>>     <mailto:MMRCG at groups.io> < MMRCG at groups.io <mailto:MMRCG at groups.io>>
>>
>>
>>     Over the weekend had occasion to help a friend move a couple
>>     model 28 teletype machines. Both were NOS with one still sealed
>>     in its wooden shipping crate. It required use of a Pallet jack,
>>     fork lift and a huge box truck.
>>
>>     The thing is that with the product line being introduced back in
>>     1951 and still being purchased by the military in the seventies
>>     they must have been in use until at least the eighties so that
>>     gave them a thirty or so year length of service. I am use to
>>     things like the UGC-74 or UGC-129 that are all long gone now but
>>     looks like the KSR-28 had a lot longer period of use. Was it the
>>     longest lived TTY?
>>
>>     Ray F/KA3EKH
>>
>>     _._,_._,_
>>     ------------------------------------------------------------------------
>>


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