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  • 1
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    Electropneumatic rheostat regulates high current (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Electropneumatic rheostat maintains a constant direct current in each of several high-power parallel loads, of variable resistance, across a single source. It provides current regulation at any preset value by dissipating the proper amount of energy thermally, and uses a column of mercury to vary the effective length of a resistance element.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: ARC-44
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Distributed Architecture For Phased-Array Antennas (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Distributed Architecture for Phased Array Antennas (DISTAR) computer program simulation tool used to study implementation of distributed phased-array equipment. Allows placement of possibly-faulty transmitting/receiving modules at locations throughout array. Variations in amplifiers and phase shifters degrades performance of antenna, depending on environmental conditions and array architecture. Enables antenna designer to examine characteristics of array and how they affect both types and extents of antenna failures. General specifications for amplifier and phase-shifter tolerances determined for various architectures. Written in FORTRAN 77.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-21236 , NASA Tech Briefs (ISSN 0145-319X); 12; 6; P. 71
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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