MFJ-266 HF/VHF/UHF Antenna Analyzer
Instruction Manual
©
2011 MFJ Enterprises, Inc.
1
1.0 Introduction
Important:
Read Section-2 before attempting to use your analyzer -- applying incorrect
operating voltages could result in permanent damage! Also, never apply a DC voltage to the
antenna connector.
General Description:
The MFJ-266 is a self-contained handheld RF analyzer that performs the
following diagnostic functions:
SWR (1:1 to 9.9:1)
Complex Impedance (Z = R + jX)
Impedance Magnitude (Z =
Ω
)
Capacitance
(pF)
Inductance
(uH)
Relative Field Strength (mV)
Frequency
(MHz)
The MFJ-266 also generates a 2-dBm RF signal that may be used to check receivers, networks,
amplifiers, and antenna patterns. Operating range is:
HF: 1.5 - 71 MHz in six HF bands
VHF: 85-185 MHz continuous coverage
UHF: 300-490 MHz continuous coverage
A 10:1 vernier drive provides smooth tuning. Measurements are displayed on an easy-to-read
LCD screen with optional backlighting. Power is supplied by internal AA cells or by a regulated
12-VDC external power source (not included). Weighing just over 1.3 pounds, the MFJ-266
package fits comfortably in one hand for convenient bench work or on-the-fly testing in the field.
Operation is simple, but you will need to read the manual to learn all of the unit's features and
functions. The more you know, the more valuable it will become as a diagnostic tool.
