[GreenKeys] WW2 IBM radioteletype network?

[Duncanancy]

For the war effort, IBM modified som of their electric typewriters into teletypewriters,but they were not compatible with 5bit units.I'll dig up sme pictures laterHave fun, DuncanK2OEQ Sent from my Kleinschmidt TT-4/TG, the US Army's first portable digital communications device, 1950-1980
-------- Original message --------From: Nick England via GreenKeys <greenkeys at mailman.qth.net> Date: 10/4/25  14:13  (GMT-05:00) To: Greenkeys <greenkeys at mailman.qth.net> Subject: Re: [GreenKeys] WW2 IBM radioteletype network? IBM?I've acquired an Air Force manual describing Army, Navy, and Commercial Communications Systems. In the Army history it talks about an initial WW2 network using Morse via the Boehme system (Wheatstone tape keyers and inked tape reception) - and then 100wpm IBM radioteletype.....Whazzat??------------The Boehme System of transmission and reception wasinaugurated. This system had already been in usein corps area nets and overseas stations as earlyas 1937. This allowed the use of perforated tapesfor transmission of messages at rates from 75 to150 words per minute.However, a radio operatorwas needed to transcribe the inked dots and dashesat the receiving end. Such circuits were operationalfrom Washington to domestic and overseas headquartersstations during 1941. b. Radio Printer Circuits. - Since transcriptionwas necessary at the receiving end, thesystem was still operating too slowly. The next stepwas the establishment of International BusinessMachine (IBM) radio printer circuits. These circuits,operating at 100 words a minute, offeredprinted-page reception from special typewriters,and eliminated manual transcription. Circuits wereestablished from Washington to Algiers, Casablanca,Asmara, Hawaii, and Puerto Rico. Thissystem had many speed-reducing characteristics resultingfrom the difference in tape width betweenthe ordinary teletype and the IBM machines. Therefore,time was consumed in relaying from landlineto radio network, and vice versa.-------------------------Nick England K4NYWwww.navy-radio.com

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