HF/VHF SWR Analyzer MFJ-209

MFJ Enterprises; Starkville (MS)

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  • Year
  • 2005 ??
  • Category
  • Amateur Equipment (Other, but not Key)
  • Radiomuseum.org ID
  • 336555

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Special principle (see notes)
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • Batteries / addl. power jack / AA: 8 x 1.5 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: HF/VHF SWR Analyzer MFJ-209 - MFJ Enterprises; Starkville MS
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 4 x 7 x 2.5 inch / 102 x 178 x 64 mm
  • Notes

  • The MFJ-209 combines three basic circuits: a wide range oscillator,  a 50 Ω RF bridge and a calibrated bridge unbalance indicator. This combination of circuits allows measurement of the SWR (referenced to 50  Ω) of any load connected to the ANTENNA connector. The FREQUENCY switch selects the following frequency ranges:
    1.8 - 4 MHz, 4 - 10 MHz, 10 - 26.2 MHz, 26.2 - 62.5 MHz, 62.5 - 113 MHz, 113 - 170 MHz.

    The MFJ-209 can be used to adjust or measure the following:
    Antennas: SWR, resonant frequency, bandwidth, efficiency
    Antenna tuners: SWR, frequency
    Amplifiers: Input and output networks
    Coaxial transmission lines: SWR, velocity factor, losses, resonance
    Balanced transmission lines: Impedance, velocity factor, resonance
    Matching or tuning stubs: SWR, resonant frequency, bandwidth
    Traps: Resonant frequency
    Tuned circuits: Resonant frequency
    Small capacitors: Value
    RF chokes and inductors: Self resonance, series resonance, value
    Transmitters and oscillators: Frequency

    The Analyzer uses a broad-band voltage detector.

    The Analyzer has an output connector for an external frequency counter for greater accuracy.

    External power can be from 8 to 18 volts DC. Current drain is 200 mA

     

  • Mentioned in
  • - - Manufacturers Literature (MFJ-209 manual version 1A (c)2005)
  • Author
  • Model page created by Rich Post. See "Data change" for further contributors.

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