• Band A: 1.5 to 2.7 MHz
• Band B: 2.5 to 4.8 MHz
• Band C: 4.6 to 9.6 MHz
• Band D: 8.5 to 18.7 MHz
• Band E: 17.3 to 39 MHz
• Band F: 33.7 to 65 MHz
• (gap*)
• Band V: 85 to 185 MHz
• Band U: 300-490 MHz

SWR, Impedance Magnitude, and Complex Impedance

In SWR Mode, the MFJ-266 reads SWR 1:1 to 9.9:1, Impedance Magnitude 10-500
Ohms and Complex Impedance (resistance and reactance). Best of all, it displays all three parameters simultaneously and operating frequency with one quick glance. No other low-cost handheld analyzer offers this! (Note: Z-mag and R+jX not displayed on UHF).

Capacitance and Inductance

Find values for unknown capacitance in pF or unknown inductance in uH quickly.
Measurements are made at RF frequencies rather than at the low audio frequencies used by many handheld L/C meters.

Frequency Measurement, Field Strength Readings

In Frequency-Counter Mode, MFJ-266 becomes an accurate 500-MHz counter with
a choice of 1-kHz or 100-Hz resolution. The counter mode also features a high-resolution digital field-strength meter for measuring the relative intensity of incoming signals. Together, these functions are extremely useful for checking the operation of oscillators, transmitters, as well as assessing the strength
of radiated signals from antenna arrays.

Built-in Interference Detection

In Frequency-Counter Mode, the MFJ-266 also tracks down powerful local signals
that can disrupt accurate SWR measurements. When picked up by an antenna under test, these signals may compete with the analyzer's internally generated test signal to make SWR readings appear artificially high. All handheld antenna bridges are subject to additive interference, but only the MFJ-266 can detect the presence of an offending signal, display its severity, and identify the operating frequency!

Powerful Signal Source

The MFJ-266 also functions as a tunable signal source, supplying about 2 Volts peak-to-peak across the entire tuning range. You can use this signal to drive mixers, low-power amplifier stages, or filters, and use it as a source for checking antenna patterns on a range. Add a step attenuator, (MFJ-762) and it becomes a low-level signal source for testing receivers and pre-amps.

Take it With You!

You'll especially appreciate the compact size and bantam weight of the MFJ-266
when up on a roof or perched on a tower. Also, push-button band switching lets you toggle across the spectrum with ease when tucked into cramped spaces.

User-Friendly Layout

MFJ-266 is ergonomic, with the antenna N-connector positioned on top of the case
and everything else carefully arranged and clearly marked on the front panel -- right in front of your eyes.

MFJ-266?s operating manual was professionally written and illustrated to help you understand and master every function quickly. It also includes a guide for ensuring accurate results and getting the most from the unit's advanced features. In the back, you'll find a one-page "Quick Guide" that reviews all controls and functions.

Many Instruments in One

Having the MFJ-266 is like owning several pieces of test equipment. You get a powerful wide-range signal source, Inductance/Capacitance meter, network analyzer, RF field-strength meter and a 500-MHz frequency counter all-in-one small package. The more you use it, the more uses you'll find for it!

Bullet Proof Construction

Features like the rugged aluminum case, solid-state band switching, robust internal construction, and solid-state LCD display ensure that minor bumps and drops won't faze your unit in the least. In fact, you can expect it to hold calibration and deliver reliable service for years to come.

Vital Statistics

MFJ-266 can be powered from eight internal AA alkaline batteries or from optional 12VDC/240 volt AC adapter. With the long storage life of alkaline batteries, your analyzer will always be ready to go when you are.

Compact 3 3/4W x 6 1/2H x 2 3/4D inches.
Weighs 1.32 lbs. Draws 30-mA in counter mode and 140-mA in analyzer mode.

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