Its huge scale gives you ultra-fine resolution and its big high-contrast numbers make reading a breeze – even across your shack. The meter needle position and motion give you an accurate indication of what’s going on quickly without actually reading the scale – like your analogue watch. MFJs exclusive TrueActiveTM peak reading circuit captures true peak or average forward and reflected power readings.
Has 400/200/20 watt ranges make it valuable for QRP or QRO operation. The full SWR scale makes reading SWR much more accurate and easier to read.
Exclusive MFJ Wattmeter Power SaverTM circuit turns on the meter only when RF power is being measured. It covers 144/220/440 MHz.
Use a 9-volt battery or 12 VDC or 110 VAC with MFJ-1312D, MFJ-867 is similar to MFJ-868 giant wattmeter but covers 144/220/440 MHz frequencies. Has 400/200/20 Watt ranges.
1) Connect your transmitter to the connector labelled TRANSMITTER and your antenna to the connector labelled ANTENNA. It is important that you use good quality coax and properly installed connectors.
2) The meter must have a power source in order to function. Power can be provided by an external 12 VDC supply such as the MFJ-1312B or an internal nine-volt “transistor radio” battery. Use a 2.1 mm coaxial plug with the centre conductor positive and the sleeve ground. MFJ’s exclusive Power Saver circuit turns the meter on only when RF power is being measured.
3) An internal lamp backlights the meter scale. The lamp requires a 12 VDC supply such as the MFJ-1312B. Use a 2.1 mm coaxial plug with the centre conductor positive and the sleeve ground. The ON/OFF switch turns the unit and internal lamp on or off.
Note: The meter must have a power source in order to function. Power can be provided by an external 12 VDC supply (negative ground only) or an internal nine-volt “transistor radio” battery.
4) To measure the power output capability of a transmitter/amplifier you should connect a quality 50-ohm dummy load to the ANTENNA connector of the MFJ867.