MFJ MFJ-9219 - Features; Controls & Connections; MFJ-9219 Controls

MFJ-9219 QRP Tuner, Wattmeter, & Dummy Load Instruction & Technical Manual
SW R ≡

Z
x
Z
0

±1
(4)
where in our case, Z
0
= 50Ω.
2.3 FEATURES
For such a small package, the MFJ-9219 is jammed-packed with features. The clear and readable
multipurpose meter provides instant feedback regarding the status of your signal and antenna
match. The compact and efficient T-network will match just about any load and has a bypass in
the event it is not needed. Finally, the resistive wattmeter is coupled to a 20W dummy load that is
engaged simultaenously as the wattmeter.
2.4 CONTROLS & CONNECTIONS
Figure 5: MFJ-9219 Controls. 1.) Multipurpose Meter, 2.) SWR Circuit BYPASS Switch, 3.)
SWR/PWR Switch, 4.) METER SENSITIVITY Knob, 5.) RADIO Connection, 6.) ANTENNA
Connection, 7.) INDUCTANCE Control, 8.) Tuner BYPASS Control, 9.) ANTENNA and TRANS-
MITTER Controls
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