100 kW HF Broadcast Transmitter SW-100A

Harris Corporation; Melbourne, Florida

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  • Year
  • 1976 ?
  • Category
  • Commercial Transmitter (TX not Transceiver)
  • Radiomuseum.org ID
  • 329147

 Technical Specifications

  • Number of Tubes
  • 5
  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Transmitter
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Alternating Current supply (AC) / 3 Phase, 50 or 60 Hz, 380 - 480 Volt
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: 100 kW HF Broadcast Transmitter SW-100A - Harris Corporation; Melbourne,
  • Shape
  • Rack
  • Notes

  • Harris' SW -100A is a high-level, plate modulated short wave broadcast transmitter, featuring automatic 10-channel pre -set tuning. Utilizing the exclusive Pulse Duration Modulator, the SW -100A provides higher efficiency, lower operating costs and overall performance superior to that of any other short wave transmitter in the 100 kilowatt power range. The transmitter is capable of operating at any frequency between 3.2 and 22 MHz at a continuous 100% sine wave modulation.

    Features:

    • High level Pulse Duration Modulation
    • Exceeds 55% overall efficiency
    • 10- Channel pre -set tuning
    • Low power consumption
    • Only five tubes for 100 kW
    • Vapor phase cooling
    • Rated 100% continuous sine wave modulation
    • Designed for trapezoidal programming
    • Minimum floor space
    • Full front and rear accessibility

    Specifications:

    POWER OUTPUT:   100,000 watts nominal unmodulated; capable 110,000 watts.
    RF FREQUENCY RANGE:  3.2 to 22.0 MHz.
    METHOD OF TUNING:  Manual, or selection of 10 pre -set channels.
    RF OUTPUT IMPEDANCE:  300 Ω balanced, 1.6 to 1 maximum VSWR
    RF FREQUENCYSTABILITY:  1 x10 -6(± 22 Hz at 22 MHz).
    SPURIOUS AND HARMONIC EMISSION:   Less than 50 mW.
    CARRIER SHIFT:  Less than 2% at 95% modulation.
    AUDIO FREQUENCY RESPONSE:  ±1.5 dB from 50 to 10,000 Hz, referenced to 1,000 Hz at 95% modulation.
    AUDIO FREQUENCY DISTORTION:   Less than 3% from 50 to 10,000 Hz at 95% modulation.
    NOISE:  55 dB below 1,000 Hz, 100% modulated level.
    AUDIO INPUT LEVEL:  0 dBm ± 2 dB for 100% modulation.
    AUDIO INPUT IMPEDANCE:  600/150  Ω , balanced or unbalanced.
    MODULATION LEVEL:  100% sinusoidal, continuous, 50 -5000 Hz.
    TRAPEZOIDAL MODULATION:  Less than 5% tilt or overshoot, 100 Hz to 2000 Hz
    OVERALL EFFICIENCY 55% @ average modulation

    CABINET DATA: Each of two cabinets measures 1.83 meters (6 feet) wide, 1 .37 meters (4.5 feet) deep, and 1 .98 meters (6.5 feet) high. The heat exchanger adds another 1.06 meters (3.5 feet) in height.

  • Mentioned in
  • - - Manufacturers Literature (Harris Radio Transmitter & Accessories, Broadcast Products Division of Harris Corp. 1976)
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

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