MFJ-993B – 300/150W Deluxe HF Automatic Tuner


Introducing the MFJ-993B – 300/150W Deluxe HF Automatic Tuner, the world’s first dual power level tuner designed to enhance your SSB/CW performance. With its innovative features and cutting-edge technology, this tuner is built to meet all your antenna tuning needs.

Out of stock


The MFJ-993B stands out with its ability to select between 300-watt SSB/CW power levels, allowing you to match antennas ranging from 6-1600 Ohms. Alternatively, you can opt for the 150-watt SSB/CW power level, providing an extra wide-range matching capability of 6-3200 Ohms. No matter the impedance, this tuner ensures compatibility by automatically balancing both unbalanced and balanced antennas.

Equipped with Adaptive Search and Instant Recall algorithms, the MFJ-993B guarantees lightning-fast automatic tuning with an impressive collection of over 20.000 VirtualAntenna Memories. Seamlessly tune your antennas within the 1.8 – 30 MHz frequency range, while also benefiting from the convenience of remote control port and radio interface integration.MFJ-993B - 300/150W Deluxe HF Automatic Tuner

The MFJ-993B utilizes a highly efficient L-network, ensuring accurate and reliable matching at both power levels. When transmitting, it automatically tunes for the minimum SWR, storing your frequency and tuner settings for future use.

In cases where impedance determination becomes challenging, the MFJ’s AdaptiveSearch algorithm comes to the rescue. It measures the frequency and calculates the relevant component values, narrowing down the search for ultra-fast tuning. For even faster searches, you have the option to set the target SWR to 2 (adjustable from 1.0 to 2.0).


  • Frequency: 1.8 – 30 MHz
  • Power: 300W SSB & 150W CW
  • Meter: Cross needle
  • Size: 254 x 64 x 228 mm
  • Includes: LCD readout & 4:1 balun
  • Cross Needle and Digital SWR/Watt Meters
  • Virtual antenna memory
  • 2500 memories per antenna
  • Manually tune when you can’t transmit
  • Lighted cross needle and digital meters
  • Backlit LCD display

Additional information

Weight1.2 kg