Buy MFJ-249B 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 clearly displays your information. Built-in frequency counter, Ni-Cad charger circuit, battery saver, low battery warning and smooth reduction drive tuning and much more. Super easy to use! Just set the band switch and tune the dial -- just like you transceiver. SWR and Complex Impedance are displayed instantly!
Here's 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. You'll 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 analyse 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 Analyser, RF resistance and Reactance Analyser, Coax Analyser, Capacitance and Inductance Meter and more! Fully portable, take it anywhere -- remote sites, up towers, on DX-peditions. Use 10AA or Ni-Cad batteries (not included) or 240VAC with MFJ-1312D, Rugged all metal cabinet is only 4x2x6 3/4 Inches.
All readings display on LCD, no meters on this model.