100 kW Medium Wave Broadcast Transmitter VP -100A

Harris Corporation; Melbourne, Florida

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  • Year
  • 1976 ?
  • Category
  • Commercial Transmitter (TX not Transceiver)
  • Radiomuseum.org ID
  • 328900

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 5
  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Transmitter
  • Wave bands
  • Broadcast only (MW).
  • 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 Medium Wave Broadcast Transmitter VP -100A - Harris Corporation; Melbourne,
  • Shape
  • Rack
  • Notes

  • 100 kW Medium Wave Broadcast Transmitter

    Features:

    • Overall efficiency better than 65%
    • Exclusive Pulse Duration Modulator [PDM] for high level plate modulation
    • Redundancy in solid state circuits
    • Continuous 100% modulation rating
    • Vapor phase cooling for quiet operation and extended tube life
    • Only five tubes, with three tube types
    • Designed for a wide climate range

    Specifications:

    POWER OUTPUT:  100,000 watts nominal unmodulated, capable 110,000 watts.
    RF FREQUENCY RANGE:  535 kHz to 1620 kHz.
    RF OUTPUT IMPEDANCE:  230 ohms, unbalanced.
    RF FREQUENCY STABILITY:  ± 5 Hz.
    SPURIOUS AND HARMONIC EMISSION:  Less than 50 mW.
    CARRIER SHIFT:  Less than 5% at 100% modulation at 1,000 Hz.
    AUDIO FREQUENCY RESPONSE:  ± 1.5 dB from 40 to 10,000 Hz, referenced to 1 kHz at 95% mod.
    AUDIO FREQUENCY DISTORTION:   Less than 3% from 40 to 10,000 Hz, at 95% mod.
    NOISE:  55dB below 100% modulation at 1,000 Hz.
    AUDIO INPUT LEVEL:  10 dBm ± 2 dB for 100% modulation.
    AUDIO INPUT IMPEDANCE:  600/150 Ω, balanced or unbalanced.
    MODULATION LEVEL:  100% sinusoidal, continuous, 50 to 5,000 Hz.
    TRAPEZOIDAL MODULATION:  Less than 5% tilt or over- shoot, 100 Hz to 2,000 Hz.

    Comprises two cabinets 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 1.07 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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