MFJ-976 Legal Limit Fully Balanced Antenna Tuner Instruction Manual
10
8. With the 3000/300 Watts button pushed in for the 600 Watt reflected scale, Transmit 100 Watts
as indicated on the reference meter. Adjust the HI REF trim pot to set the reflected power scale
to 100 Watts.
9. SWR requires no calibration.
Figure 1: Test Setup
Figure 2: PCB Layout and Trim Pot Location
Transmitter/
Transceiver
Standard
Reference
Wattmeter
MFJ-976
SWR/
Wattmeter
50-Ohm
Dummy Load
HI FWD
LO REF
HI REF
LO FWD
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