MFJ-914 1.8 – 30 MHz Auto Tuner Extender


Introducing the MFJ-914 1.8 – 30 MHz Auto Tuner Extender, a game-changing device that enhances your HF rig’s automatic tuner capabilities. If you’ve been frustrated with the limited matching range, look no further than the MFJ AutoTuner Extender. With this ingenious device, you can transform your antenna impedance up or down by as much as ten times, putting almost any antenna within the range of your automatic tuner.


Not only does the MFJ-914 extend the range of automatic antenna tuners, but it also works seamlessly with any transceiver from 160 through 10 meters, supporting power output of up to 300 watts. Whether you’re a seasoned ham radio operator or just starting out, this tuner extender is a must-have for optimizing your antenna system.

The MFJ-914 is designed with precision and excellence in mind. Carefully crafted to deliver the flattest frequency response and the lowest loss, this tuner extender ensures top-notch performance every time. Its compact size of 150 x 42 x 90 mm and lightweight construction of 415 g makes it easy to integrate into your setup without taking up unnecessary space.

Installing the MFJ-914 is straightforward. Simply connect it in-line between your transmitter and antenna. Attach your transmitters’ antenna output to the SO-239 connector labelled «Transmitter». Connect your antenna to the «Antenna» connector. For maximum protection of your transceiver, we recommend connecting a 50-ohm dummy load to the plug labelled «Dummy Load» and grounding the «Ground» stud to a reliable RF ground. MFJ-914 1.8 - 30 MHz Auto Tuner Extender

The MFJ-914 comes equipped with several features to meet your needs. It offers seven load positions, allowing you to fine-tune your antenna’s impedance to achieve optimal performance. Additionally, it includes a ground and bypass position, providing versatility in various operating conditions. This tuner extender also boasts SO-239 sockets, a connection for the dummy load, and a separate earth terminal for enhanced functionality.

In summary, the MFJ-914 1.8 – 30 MHz Auto Tuner Extender revolutionizes your antenna system by significantly expanding your automatic tuner’s matching range. With its exceptional design, robust specifications, and convenient features, this extender is a must-have for any HF rig enthusiast. Upgrade your setup today and experience the difference that the MFJ-914 can make.

Additional information

Weight 0.6 kg