Amateur Radio Products



HF/VHF Antenna/SWR Analyzer w/ Meter

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Download the MFJ-209 Manual

The MFJ-209 SWR Analyzer is an easy to operate, versatile test instrument for analyzing nearly any 50 ohm RF system on frequencies between 1.8 and 170 MHz. In addition the MFJ-209 can be used as signal source.

The MFJ-209 combines three basic circuits; a wide range oscillator, a 50 ohm RF bridge, and a calibrated bridge unbalance indicator. This combination of circuits allows measurement of the SWR (referenced to 50 ohms) of any load connected to the ANTENNA connector.

The MFJ-209 covers all ham bands from 2 meters to 160 meters. The dial calibration is approximate and for reference only. The actual frequency may vary from what is marked on the front panel. The MFJ-209 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

A frequency counter can be connected to the "FREQ. OUT" jack (RCA phono) to get a more accurate reading of the frequency. As an alternative to a frequency counter, you can zero beat the output with an HF receiver. See the section on zero beating the MFJ-209 with a receiver.

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

Add to Cart:

  • Model: MFJ-209
  • Shipping Weight: 1.8lbs
  • Manufactured by: MFJ

This product was added to our catalog on Wednesday 10 October, 2007.

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