HF/VHF SWR Analyzer MFJ-209

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

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