The MFJ-939i HF Automatic Antenna Tuner is a versatile solution designed to enhance the performance of Icom transceivers. This plug-and-play tuner automatically adjusts your antenna settings as you tune your radio, ensuring that the Standing Wave Ratio (SWR) remains consistently low. It can tune coax-fed and random wire antennas across a frequency range of 1.8 to 30 MHz, accommodating power levels from 2 Watts QRP to 200 Watts SSB/CW. With the ability to match impedances from 6 to 1600 Ohms and handle SWR ratios up to 32:1, it offers a significantly more comprehensive matching range than many competing products.

One of the standout features of the MFJ-939i is its intelligent tuning capability. As users engage in various operations, such as rag chewing, contesting, or DXing, the tuner learns from the antenna’s performance and the operator’s habits. This dynamic learning process is supported by an impressive memory capacity of 20,000 settings, allowing the tuner to recall optimal configurations for future use. This means that the more you operate with the MFJ-939i, the better it becomes at providing instant matches tailored to your specific setup.

Manufactured in the USA, the MFJ-939i combines high-quality construction with advanced technology, making it a reliable choice for amateur radio enthusiasts. Its ultra-fast tuning capability ensures operators can quickly adjust to changing conditions without interrupting communication. This tuner simplifies the setup process and enhances overall efficiency, allowing users to focus on their conversations and activities rather than technical adjustments.

It is wired for an Icom; however, with an adjustment inside and different cables, it can be changed to work with Kenwood and Yaesu! The Kenwood and Yaesu Need compatible leads