MFJ 259C 530 kHz - 230 MHz Antenna SWR Analyzers

4 Customer Reviews

MFJ 259C 530 kHz - 230 MHz Antenna SWR Analyzers are compact, battery-powered RF impedance analyzers. They combine four basic circuits; a 0.53-230 MHz variable frequency oscillator, a frequency counter, a 50 ohm RF-bridge, and an 8-bit micro-controller. These analyzers make a wide variety of useful antenna or impedance measurements, including coaxial cable loss and distance to an open or short. Although primarily designed for analyzing 50 ohm antenna and transmission line systems, MFJ 259C Analyzers also measure RF impedances between a few ohms and several hundred ohms.

They also function as a signal source and frequency counter! Their frequency range of impedance measurement is 0.53 to 230 MHz in several overlapping bands. The accuracy of the analyzers is enhanced by the use of special microwave zero-bias Schottky detectors with matching compensating diodes. They are compensated to provide the best possible linearity with both high and low impedance loads, making the A/D converter's 0.5 percent resolution the primary limitation.

Unlike MFJ's 259B Antenna Analyzers, these new "C" versions have two frequency-range knobs to allow wider control. The new lower-frequency coverage allows analysis of 160 meter antennas as well as MW (AM broadcast) and other shortwave frequencies. The extended coverage to include the 220 MHz band is another very worthwhile addition!

MFJ 259Cs may be used to test:

*Antennas: SWR, impedance, reactance, resistance, resonant frequency, and bandwidth
* Antenna tuners: SWR, bandwidth, frequency
* Amplifiers: input and output matching networks, chokes, suppressors, traps, and components
* Coaxial transmission lines: SWR, length, velocity factor, approximate Q and loss, resonant frequency, and impedance
* Filters: SWR, attenuation, and frequency range
* Matching or tuning stubs: SWR, approximate Q, resonant frequency, bandwidth, impedance
* Traps: Resonant frequency and approximate Q
* Tunes circuits: Resonant frequency and approximate Q
* Small capacitors: Value and self-resonant frequency

MFJ-259Cs are a complete Ham Radio test station with frequency counter, RF signal generator, SWR/Resistance/Reactance/Coax Analyzer, Capacitance/Inductance Meter and much more. Get one of your own MFJ 259C 530 kHz - 230 MHz Antenna SWR Analyzers from DX Engineering and be CERTAIN of your antenna system's performance!