MFJ MFJ-868B - Introduction; Features; Controls

MFJ-868B Giant True Peak Reading SWR/Wattmeter 1.8-60 MHz
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MFJ-868B Giant SWR/Wattmeter
Introduction
The MFJ-868B Giant SWR/Wattmeter is the World’s Largest HF SWR/Wattmeter.
The MFJ-868B measures peak or average forward and reflected power as well as
standing wave ratio. It is designed to operate on 1.8-60 MHz. The MFJ-868B has three
power scales, which are selected with the front panel slide switch. The high power scale
measures 0-2000 Watts forward or reflected power. The mid power scale measures 0-200
Watts forward and reflected power. The low power scale measures 0-20 Watts forward
and reflected power. MFJ’s exclusive Power Saver circuit turns the meter on only when
RF power is being measured. The MFJ-868B utilizes a large illuminated 6.5-inch Single-
Needle meter to read the SWR from 1:1 to ∞.
Features
• Huge Backlit Meter: 6.5 in. measured diagonally across the front.
• Easy-to-Read Scales: Large numbers and pickets make reading a breeze.
• Power Saver Circuit: Meter turns on only when transmitting.
• Three Power Scales: 20/200/2000 Watt power scales.
• Forward and Reflected: Measures forward power and reflected power.
• Peak or Average Reading: Measures Peak or Average power.
• Power or SWR: Measures Power and SWR.
• Easy-to-Set SWR: Easy set for accurate SWR measurements.
• Frequency Range: 1.8 - 60 MHz.
• Input/Output Impedance: 50 Ohms.
FWD SET
PEAK
REF SWR
AVG
20W
200W
2kW
PWR
SWR
MFJ SWR/Wattmeter Giant
MFJ-868
OFF
MAXMIN
ON
S
WR SET
Figure 1: Controls
Controls
1. 20W / 200W / 2kW switch: Selects between 20, 200, 2000-Watt power scales.
2. PEAK/AVG switch: Selects Peak or Average power measurement.
3. SWR/PWR switch: Selects Power or SWR measurement.
4. REF/FWD switch: Selects forward or reflected power measurement.
5. SWR/SET switch: Selects SWR measurement or set.
6. SWR SET knob: Sets full-scale deflection to measure SWR.
7. ON/OFF switch: Turns power to the unit and lamp on or off.