For calibration instructions, please click here.
The Worlds most popular SWR/RF analyzer just got incredibly better and gives you more value than ever!
MFJ-259B gives you a complete pictures of your antennas performance. You can read antenna SWR and Complex Impedance 1.8 to 170MHz
Read Complex Impedance as series resistance and reactance (R+jX) or as magnitude (Z) and phase (degrees). You can determine velocity factor, coax cable loss in dB, length of coax and distance to a short or open in feet. You can read SWR, return loss and reflection coefficient at any frequency simultaneously at a single glance. Also read inductance in UH and capacitance in pF at RF frequencies. Large easy-to-read two line LCD screen and side-by-side meters clearly display your information. Built-in frequency counter, Ni-Cad charger circuit, battery saver, low battery warning and smooth re-duction drive tuning and much more.
Super easy to use! Just set the bandswitch and tune the dial — just like you transceiver. SWR and Complex Impedance are displayed instantly!
Heres what you can do
Find your antennas true resonant frequency. Trim dipoles and verticals.
Adjust your Yagi, quad, loop and other antennas, change antenna spacing and height and watch SWR, resistance and reactance change instantly. Youll know exactly what to do by simply watching the display. Perfectly tune critical HF mobile antennas in seconds for super DX — without subjecting your transceiver to high SWR. Measure your antennas 2:1 SWR bandwidth on one band, or analyze multiband performance from 1.8 to 170Mhz! Check SWR outside the ham bands without violating FCC rules. Take the guesswork out of building and adjusting matching networks and baluns. Measure distance in feet to a short or open in faulty coax. Measure length of a roll of coax, coax loss, velocity factor, impedance. Measure inductance and capacitance. measure resonant frequency and approximate Q of traps, stubs, transmission lines, RF chokes, tuned circuits and baluns. Adjust your antenna tuner for a perfect 1:1 match without creating QRM. And this is only the beginning! the MFJ-259B is a complete ham radio test station including — frequency counter, RF signal generator, SWR Analyzer, RF resistance and Reactance Analyzer, Coax Analyzer, Capacitance and Inductance Meter and more!