RELIABILITY DESIGN REVIEW, UHF NARROW BAND DATA LINK TRANSMITTER MODEL TYPE 19AL, GENERAL ELECTRONICS LABORATORIES, INC. (PHILCO TYPE WDL-T-17).
PHILCO CORP PALO ALTO CALIF
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The design employs low level frequency modulation of a relatively low frequency oscillator approximately 30mc suitably multiplied and amplified to provide the required output frequency and power into a 52-ohm load. Vacuum tubes are used in all r-f circuitry. The transmitter group is composed of three major components 1 Power supply, 2 basic four-watt transmitter, and 3 15-watt r-f power amplifier. Each of the three component assemblies is separately housed in a hermetically sealed magnesium container. Interconnecting cable connectors are mounted on the top surface of each component. The transmitter was originally designed for operation at an altitude of 80,000 feet for relatively short periods of time and for this reason the containers are pressurized at two atmospheres of air. Primary power input of 240 watts at 28 volts d c is required for the T-17. The narrow band transmitter functions as an integrated portion of a subsystem to provide transmission of telemetry information from vehicle to ground stations during all phases of flight.