MFJ-828 – Digital SWR/Wattmeter


Introducing the MFJ-828 – Digital SWR / Wattmeter / Frequency Counter, a versatile and reliable tool designed for amateur radio enthusiasts. This powerful device offers a wide range of features and exceptional accuracy to enhance your ham radio experience.


With three high-resolution ranges, the MFJ-828 covers frequencies from 1.8 to 54 MHz, ensuring precise measurements across a broad spectrum. The QRP range, with a full-scale power of 25 watts, is perfect for low-power operations, while the mid-range (250 watts) and high-range (1500 watts) cater to higher power needs.

Equipped with the innovative TrueActive peak reading circuit, this SWR/Wattmeter accurately measures both peak and average power on all modes, allowing you to assess your transmission performance with confidence. The built-in frequency counter is a valuable addition, providing digital frequency readout in continuous carrier mode. Now, you can effortlessly monitor and adjust your transmitter’s frequency with ease.

One notable feature of the MFJ-828 is the inclusion of MFJ’s Amplifier Bypass Control. This ingenious mechanism safeguards your amplifier by automatically taking it offline if the SWR exceeds a predefined limit. A relay connector with normally open and normally closed connections conveniently toggles when the SWR surpasses the preset threshold, ensuring your equipment remains protected. MFJ-828 - Digital SWR/Wattmeter

When idle or in the absence of a transmit signal, the MFJ-828 enters sleep mode. By turning off the microprocessor clock, it avoids the generation of unwanted spurious signals, promoting a clean and interference-free environment.

Let’s Explore Some of Its Notable Features:

  • The MFJ-828 boasts a selectable power range of 25, 250, or 1500 watts, accommodating a wide range of power requirements.
  • Its continuous frequency coverage spans from 1.8 to 54 MHz, ensuring seamless operation across various frequencies.
  • With an adjustable alarm SWR from 1.5 to 3.0, you can set custom thresholds and receive alerts for optimal antenna performance.
  • The Amplifier Bypass Control automatically safeguards your amplifier during high SWR events, adding an extra layer of protection to your equipment.
  • The lighted cross-needle SWR/wattmeter features auto-ranging, enabling effortless monitoring of SWR and power levels.
  • A user-friendly multifunction backlit LCD display with contrast control provides clear and easy-to-read numeric readings for frequency, SWR, forward, and reflected power.
  • Bar meters for SWR, forward, and reflected power utilize auto-ranging, allowing for quick and accurate power measurements.
  • You can easily switch between peak or average power modes based on your preference or specific requirements.
  • The built-in frequency counter ensures precise frequency measurement, enhancing the precision of your transmissions.
  • With a built-in bootloader for field upgradeable firmware, the MFJ-828 offers flexibility and future-proof functionality.

Discover the power and accuracy of the MFJ-828 Digital SWR/Wattmeter/Frequency Counter. Elevate your amateur radio experience with this reliable and feature-rich tool, designed to meet the needs of discerning radio enthusiasts.

Additional information

Weight 1 kg