MFJ-259B Antenna Analyzer Information and Guides

Find documentation, calibration procedures, modification guides, and reviews for the MFJ-259B antenna analyzer.

David
Reviewed by • Senior RF Engineer & Technical Editor • March 2026

The MFJ-259B is a popular antenna analyzer used by hams to measure SWR, impedance, and other parameters across HF and VHF bands. Operators rely on this portable device for tuning antennas, checking feedlines, and troubleshooting station issues, making it a common tool in many shacks and for field operations. Its ability to provide quick readings helps hams optimize their antenna projects and ensure efficient signal transmission for better QSOs.

This category provides practical resources for MFJ-259B owners, including detailed calibration procedures to ensure accurate readings. Hams can find modifications for extending the analyzer's frequency range, such as operation on the 630-meter band, and tips for fast-charging internal batteries. There are also technical documents and reviews, like those found on eHam, offering insights into common problems and overall performance of the MFJ-259B.

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