Key facts
- Manuals
- 3
- Languages
- EN
- Last added
- 2026-10-26
Featured MFJ Enterprises manuals
MFJ Enterprises MFJ-986 Differential-T Tuner Instruction 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.
Covers: Introduction · Understanding Power Ratings · Peak Reading SWR/Wattmeter · Antenna Selector · Current Balun · Installation
MFJ-1204 USB Radio Interface User Manual
The MFJ-1204 is a USB radio interface designed to connect Ham radios to computers for digital modes. It features full USB connectivity, is powered directly by the USB port, and includes a dedicated on-board sound card. The device supports various communication modes such as CW, RTTY, PSK31, and EchoLink, and works with dozens of free downloadable programs.
Covers: Introduction · MFJ-1204 Features · Connecting to your Radio · Changing Radios · Connecting to the Computer · Communication Modes
MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual
The MFJ-993B IntelliTuner is an automatic antenna tuning center designed to match antennas with impedances ranging from 6 to 1600 ohms (at 300 watts) or 6 to 3200 ohms (at 150 watts). It features a switching L-network, a built-in frequency counter, and a lighted cross-needle SWR/wattmeter. The unit supports two antennas with over 20,000 non-volatile memory locations for storing tuner settings.
Covers: The Basics · Features · Specifications · Front Panel · Back Panel · Installation
Latest MFJ Enterprises manuals
MFJ Enterprises MFJ-986 Differential-T Tuner Instruction Manual
User Manual 11 pages · 116 KB · ENThis instruction manual covers the installation, operation, and tuning procedures for the MFJ-986 3kW roller inductor antenna tuner.
MFJ-1204 USB Radio Interface User Manual
User Manual 12 pages · 117 KB · ENThis manual covers the setup, operation, and jumper configuration for the MFJ-1204 USB Radio Interface, a device for connecting Ham radios to computers.
MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual
User Manual 40 pages · 506 KB · ENThis manual provides operating instructions for the MFJ-993B IntelliTuner automatic antenna tuner, covering features, installation, menu navigation, and…
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in MFJ Enterprises manuals
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.
From: MFJ Enterprises MFJ-986 Differential-T Tuner Instruction Manual
What frequency range does this tuner cover?
It continuously tunes all frequencies from 1.8 through 30 MHz.
From: MFJ Enterprises MFJ-986 Differential-T Tuner Instruction Manual
Does the MFJ-1204 require a separate power adapter?
No, the MFJ-1204 is powered directly by the USB port and does not need a power adapter.
What software is recommended for the MFJ-1204?
While MFJ does not endorse specific programs, many operators recommend HamScope as a good starting point.
What is the minimum power required to tune?
The minimum power to tune is approximately two watts.
From: MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual
How many memory banks are available per antenna?
Each of the two antennas has four banks of memory.
From: MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual