MFJ Enterprises is a leading manufacturer of amateur radio equipment, electronic components, and ham radio accessories like tuners, antennas, and SWR meters.
MFJ Enterprises is a prominent American manufacturer specializing in a wide range of products tailored for the amateur radio market. Founded in 1972 by Martin F. Jue, the company has grown into a major producer of ham radio accessories, serving both novice operators and expert technicians worldwide. Their extensive product lineup includes manual and automatic antenna tuners, SWR/Wattmeters, noise canceling signal enhancers, dummy loads, power supplies, wire antennas, and various HF/VHF/UHF communication tools.
Whether you are setting up a home base station, outfitting a portable rig, or building specialized radio kits, MFJ provides versatile and economical solutions. From apartment-friendly window-mount antennas to high-current DC power strips and digital meters, MFJ's components ensure reliable signal reception and transmission. Known for their robust consumer support and renowned 'No Matter What' warranty, MFJ products are built to withstand the demands of dedicated amateur radio enthusiasts.
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You can download digital PDF copies of user manuals, schematics, and instructions for MFJ antenna tuners, SWR meters, and other amateur radio accessories directly from this page or by visiting the MFJ Enterprises support site.
You can contact MFJ technical support by calling +1-662-323-0549 or emailing techinfo@mfjenterprises.com. General customer service can be reached at +1-662-323-5869. Their business hours are generally Monday through Friday, 8:00 AM to 4:30 PM CST.
MFJ offers a renowned "No Matter What" warranty which typically covers products for a full 12 to 24 months, offering repair, replacement, or parts for defective units as long as you have a dated proof of purchase.
According to most MFJ manuals, their warranty is generally not voided for owners who attempt to repair defective units themselves. They actively support operators and offer technical consultation to assist with customer repairs.