MFJ-259D SWR Antenna Analyzer 100KHz-230MHz and 2200 Meter band

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MFJ-259D SWR Antenna Analyzer 100 KHz-230 MHz and 2200 Meter band

MFJ 259D 100 KHz-230 MHz plus 2200 Meter Antenna SWR Analyzers are compact, battery-powered RF impedance analyzers. They combine four basic circuits; a 100-140 kHz and 280 kHz to 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 259D 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 done with 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 the old MFJ's Antenna Analyzers, these new "D" versions have two frequency-range knobs. The new lower-frequency coverage allows analysis of 137 kHz, 472-479 kHz and 160 through 1.25 meter antennas, including MW (AM broadcast) and shortwave frequencies. The extended coverage for the new 630 and 2200 meter bands is a very worthwhile addition!

MFJ 259D 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  Michael Brigmond Brand Manager GigaParts 11/15/2022

MFJ-259D -- World’s most popular Antenna Analyzer just got better!  Now covers super wide range -- 100 KHz-230 MHz and 2200 Meter band!  

Super easy to use! Set the band switch and tune -- just like your transceiver. SWR, Complex antenna Impedance and frequency are all instantly displayed simultaneously!

Gives you complete picture of your antenna Read SWR, return loss and reflection coefficient at any frequency all at once. Read Complex Impedance as
series resistance and reactance (R+jX) or as magnitude (Z) and phase(degrees). Determine velocity factor, coax cable loss in dB, length of coax
and distance to a short or open in feet. Measure inductance in uH and capacitance pF at actual operating frequencies.

All-in-one ham radio test set Includes frequency counter, RF Generator, SWR Analyzer TM, RF Resistance and Reactance Analyzer, Coax Analyzer, Capacitance/Inductance Meter... and more! Large easy-to-read two-line LCD
screen and side-by-side meters clearly display your information

Here’s what you can do . . .

  • Find your antenna’s true resonant frequency. Trim dipoles, verticals for lowest SWR at your favorite frequency.
  • Adjust your Yagi, quad, loop and other antennas, change antenna spacing and height. Watch SWR, resistance and reactance change instantly. You’ll know exactly what to do by simply watching the displays.
  • Perfectly tune critical HF mobile antennas in seconds for super DX -- without subjecting your rig to high SWR
  • Measure your antenna’s 2:1 SWR bandwidth and analyze multiband performance! Check SWR outside ham bands without transmitting and violating FCC rules. Adjust your antenna tuner or a perfect 1:1 without creating QRM.
  • Take the guesswork out of building and adjusting matching networks and baluns and antennas.  Accurately measure distance-to- short or open in failed coax. Measure coax length in feet, loss in dB, velocity factor and impedance. Measure inductance, capacitance. Troubleshoot resonant frequency, Q of traps, stubs, transmission lines, RF chokes, tuned circuits and baluns.

Built-in Ni-MH/Ni-CD charger circuit, battery saver, low battery warning and smooth reduction drive tuning.
Use 10 AA or Ni-MH batteries (not included) or 110-240 VAC with optional

Rugged, compact all- aluminum construction is a handheld

Size 4Wx63 / 4Hx2D inches.




Brand: MFJ
Manufacturer's Part Number: MFJ-259D
GigaParts Number: ZMF-259D
Part Type: Antenna Analyzers
Product Line: MFJ 259D 280 kHz - 230 MHz plus 2200 Meter Antenna SWR Analyzers
Antenna Analyzer Frequency Range: 0.10-0.14/0.28-230 MHz
Case Included: No
RF Connector Type: UHF female, SO-239
Band Selection Control: Rotary switch
Frequency Control Style: Dial
Internal Battery Operation: Yes
Power Supply: Ten AA batteries
Batteries Included: No
External Power Input Voltage: 12 Vdc
Analyzer Width: 4.000 in.
Analyzer Height: 6.750 in.
Analyzer Depth: 2.000 in.

Sold individually.


UPC: 650619125900 

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