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Classified: MFJ 259B ANTENNA ANALYZER

Date Posted By Category User IP Address
2018-11-03Login requiredTest EquipmentLogin required
MFJ 259B HF/VHF SWR analyzers are
compact, battery-powered RF
impedance analyzers. They combine
four basic circuits; a 1.8-170 MHz
variable frequency oscillator, a
frequency counter, a 50 ohm RF
bridge, and an 8-bit micro-
controller. The analyzers make a
wide variety of useful antenna or
impedance measurements, including
coaxial cable loss and distance to
an open or short. Primarily
designed for analyzing 50 ohm
antenna and transmission line
systems, the MFJ 259B HF/VHF SWR
analyzers also measure RF
impedances between a few ohms and
several hundred ohms. They also
function as a signal source and
frequency counter. The frequency
range of impedance measurement is
1.8 to 170 MHz, in six 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 1/2 percent
resolution the primary limitation.

Can 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,$100. Pick up only