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Analyzer 1.8-170 MHz.


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The MFJ-259 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- 259 can be used as signal source and as an accurate frequency counter.

The MFJ-259 combines four basic circuits: a wide range oscillator, a frequency counter, 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-259 FREQUENCY switch selects the following frequency ranges: 1.8 - 4, 4 - 10, 10 - 26.2, 26.2 - 62.5, 62.5 - 113 and 113 - 170 MHz.

The MFJ-259 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 MFJ-259 requires between 8 and 18 volts for proper operation. Any power supply used with the MFJ-259 must be capable of supplying 200mA of current. Uses ten AA cells (not supplied) or optional MFJ-1312D.

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