All I have is the 1946 Model 27 parts book, which does refer to it as
the TT-4/TG
I presume that was just a typo for the "KSR-28" which is listed in all
the PDP-4 literature.
Nick England K4NYW
Chapel Hill NC
www.navy-radio.com
On Wed, Apr 29, 2026 at 11:14 AM Thalia Archibald via GreenKeys
>
> A mention of a "KSR-27 teletype" caught my attention in these memos on the
> formation of the DEC Computer Museum in 1979. I'd never heard of this model and
> I'm surprised it's not one of the more typical models used with a computer. Does
> anyone know anything about the Model 27?
>
> CONFIGURATION LIST
>
> PDP-4 #1
>
> 1 central processor
> 8K memory
> 1 line printer (Analex)
> 2 card readers (Burroughs)
> 4 tape units (Potter - I think)
> 1 card punch interface (IBM)
> 1 Dectape control
> 2 555 Dectape transports
> 1 KSR-27 teletype
> 1 paper tape reader/punch
>
>
> This site on telegraph equipment says
>
> Model 27 - referenced in museum book - says that is the model number for
> TT-4/TG (XC-2) a proposed military machine with a typing unit like a Model
> 26 and a keyboard like a Model 31. Says only 10 units were made. Note that
> the production TT-4/TG is a Kleinschmidt machine.
>
>
> Thalia
> ______________________________________________________________
> GreenKeys mailing list
>
>
______________________________________________________________
GreenKeys mailing list