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Topic: Radioteletype

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  Radio Research Paper - Message Center
Radioteletype System Diagram - Only the frequency shift exciter and transmitter are located in Radio 2.
This device permitted the transmission and reception of radioteletype (RATT) messages between stations that were similarity equipped.
When Radioteletype (RATT) was first introduced to the fleet, broadcast traffic could be cleared at speeds of 60 wpm as compared to the 25 wpm speed of the CW fleet broadcast.
jproc.ca /rrp/mcentdes.html   (5284 words)

 Encyclopedia: Radioteletype   (Site not responding. Last check: 2007-11-07)
Teletype machines in World War II A teleprinter (teletypewriter, teletype or TTY) is a now largely obsolete electro-mechanical typewriter which can be used to communicate typed messages from point to point through a simple electrical communications channel, often just a pair of wires.
Radioteletype (RTTY) is a ((often plural) systems used in transmitting messages over a distance electronically) telecommunications system consisting of two (A character printer connected to a telegraph that operates like a typewriter) teleprinters linked by a (A communication system based on broadcasting electromagnetic waves) radio link.
RTTY uses a variety of different ((electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase) modulation methods, of which (Click link for more info and facts about frequency shift keying) frequency shift keying are the most common.
www.nationmaster.com /encyclopedia/Radioteletype   (298 words)

 A Phone of Our Own: Chapter One   (Site not responding. Last check: 2007-11-07)
Weitbrecht's experience with his radioteletype station, one of the first on the air since amateur radio began, taught him the value of challenging government communications regulations.
In January of 1951, he petitioned the FCC to permit radioteletype operation on a broader range of frequencies.
Weitbrecht's travel with bulky radio equipment and heavy teletypewriters in the 1950s probably shaped his later belief that equipment portability was essential for deaf access to telephony.
gupress.gallaudet.edu /excerpts/enewsPOOOone3.html   (258 words)

 TSC-15 Communications Central
The only electrical difference between the two transmitters seems to be a shorting jumper on the barometric pressure sensor switch in the ground models, presumably added to prevent the radio from reacting to concussion from nearby artillery.
A TS-1635/TSC-15 test bo