MFJ Enterprises MFJ-986 Differential-T Tuner Instruction Manual

This instruction manual covers the installation, operation, and tuning procedures for the MFJ-986 3kW roller inductor antenna tuner.

MFJ Enterprises MFJ-986 Differential-T Tuner Instruction Manual - cover page
Brand
MFJ Enterprises
Document type
User Manual
Language
English
Pages
11
File format
PDF
File size
116 KB
Published
26 October, 2026
Updated
26 October, 2026
MD5 checksum
F487B307201F17D714A636CACBF2A75B
PDF
MFJ Enterprises MFJ-986 Differential-T Tuner Instruction Manual PDF

About this manual

The MFJ-986 is a differential capacitor antenna tuner designed to match transmitters or amplifiers with 50 ohm output impedances to various antennas. It features a peak reading cross-needle SWR/wattmeter and an internal six-position antenna selector switch for coaxial, balanced, and dummy load connections.

What's inside

  • Introduction
  • Understanding Power Ratings
  • Peak Reading SWR/Wattmeter
  • Antenna Selector
  • Current Balun
  • Installation
  • Operation

Frequently asked questions

What is the maximum power this tuner can handle?

The MFJ-986 is rated for a 3000 watt PEP input and a 1500 watt PEP output.

What frequency range does this tuner cover?

It continuously tunes all frequencies from 1.8 through 30 MHz.

How do I set the meter for a transmitter with more than 200 watts?

Set the POWER switch to the 2000W HI position.

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