papers & manuals
A Model 28 ASR Teletype machine. The Cadillac of teleprinters, this model includes a manually operated 60, 67, and 100 wpm gear transmission. Also contains a printing chadless reperferator. This particular unit is currently teamed up with a HAL ST-5000 TU, fed by a Collins S line. It still prints RTTY bulletins from W1AW on a weekly basis.
Teletype Corporation ASR-33 teleprinter
Operation of these machine, used in 1920-1950, is almost purely mechanical; the only part that could be considered "electronic" is (fairly simple) power supply.
Speed of communication is 110 baud, or approximately 10 characters per second (about 100 words/minute). The keys has to be depressed about a half-inch before a character would be generated. The teletype machine is only capable of rendering text in upper case (due to the limited size of the cylindrical print- head). Stone Age, yes; but functional. (1)
(2) This is perhaps the first impression nascent
programmers got of computing (at least in my generation). These sturdy
devices provided hardcopy output and a keyboard for input in the same
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|2||Copyright © 1996, 1997, Carl R. Friend. All rights firstname.lastname@example.org|