The MFJ-826B digital SWR/Wattmeter/Frequency Counter can measure up to 1500 watts. It has three high resolution ranges with accuracy in each range from 1.8 to 54 MHz. True peak or average forward and reflected watts, SWR and frequency can be simultaneously displayed. 

There are also auto-ranging bar meter modes to display forward and reflected power, SWR and power twin bar meters, or SWR only bar meter; SWR and forward power are also displayed numerically.  PeakHoldTM feature freezes the highest forward power displayed bar segment for one, two or three seconds. These digital-analog displays make it visually easy to tune antenna tuners, amplifiers and transmitters.

There are three high-resolution forward/reflected power ranges that are automatically selected: a QRP range (25 watts full scale), a mid-range (250 watts full scale) and a high-range (1500 watts full scale).  TrueActiveTM peak reading circuit gives true peak or average power on all modes.

Built-in frequency counter gives any transmitter digital frequency readout in continuous carrier mode.  Perfect for older and QRP rigs without these features.

The MFJ-826B enters a “sleep” mode when idle and when no transmit signal is present, turning off the microprocessor clock to avoid the generation of spurious signals.

The use of a regulated supply is not mandatory but is recommended for best performance. An optional 12 volts DC 500 milliamp power supply, the MFJ-1312D, is also available.

 

Features

• Power range of 25, 250 or 1500 watts

• 1.8 to 54 MHz continuous frequency coverage

• Adjustable alarm SWR from 1.5 to 3.0

• Multifunction backlit LCD display with contrast control

• Numeric readings for frequency, SWR, forward and reflected power

• Bar meters for SWR, forward and reflected power with auto-ranging

• Peak or average power mode

• Built-in frequency counter

• Built-in bootloader for field upgradeable firmware

MFJ-826B Wattmeter Instructions (282K pdf)

Specifications

• RF power range : 25, 250 or 1500 watts

• Frequency range : 1.8 to 54 MHz continuous coverage

• Frequency counter accuracy : ±1 kHz

• A/D conversion resolution : 10-bit

• Forward power display resolution : 0.1 for < 100 watts and 1 for ≥ 100 watts

• Reflected power display resolution : 0.1 for < 10 watts and 1 for ≥ 10 watts

• SWR display resolution : 0.01 for < 10:1 and 0.1 for ≥ 10:1

• Power bar meters resolution : 60 segments

• SWR bar meter resolution : 56 segments

• Memory endurance : 1 million erase/write cycles typical

• Memory data retention : 100 years typical

• Power supply requirement : 12 - 15 volts DC

• Current consumption : 250 milliamps or less

• Dimensions (projections included) : 6 ½ × 2 ¾ × 6 ¾ in; 165 × 70 × 171 mm (w × h × d)

• Display : 2-line × 16-character backlight LCD

• TRANSMITTER connector : SO-239

• ANTENNA connector : SO-239

• POWER connector : 2.1 × 5.5 mm coaxial plug, center pin positive

• RS-232 connector : D-sub 9-pin

† Specifications and design are subject to change without notice or obligation.