Accession Number:

AD0263624

Title:

DEVELOPMENT OF TELEGRAPH TERMINAL TH-22( )/TG

Descriptive Note:

Corporate Author:

STELMA INC STAMFORD CONN

Personal Author(s):

Report Date:

1961-06-01

Pagination or Media Count:

1.0

Abstract:

Research is on the development of a lightweight transistorized terminal capable of co verting teletypewriter output into frequency-shift voicefrequency signals and vice versa, and of breaking in on a telegraph transmission. The report covers the study phase of the project during which time 1 covering specification SCL1566A was analyzed 2 power supply and circuitry, based on that of the TH-22 XC-1TG, was breadboarded and tested and 3 possible approaches to the break-in feature were formulated. One approach us s a resonant-reed relay to detect the break-in signal the other, a lowpass filter to separate the break-in signal from local keying frequencies. Bec use this is the first report on t project, no firm conclusions re reached. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE