MFJ VERSA TUNER III - Introduction to MFJ-962 B Versa Tuner III; SWR;Wattmeter Functionality; Antenna Selector Operation; Installation Guide

INTRODUCTION
The MFJ-962B VERSA TUNER III is an antenna tuning unit de-
signed for use in Amateur transmitting systems. The tuner
is designed to match most antenna systems from 1.8 to 30 MHz,
and will handle 1.5 KW PEP RF output power.
SWR/WATTMETER
The cross needle meter is easy to use. To read FORWARD
power, set the POWER switch to Hi or Lo then read the power
level on the forward scale. Maximum power reading on the Hi
scale is 2KW and Maximum power reading for the Lo scale is
200W. Reflected power con be read from the reflected power
scale. SWR is indicated by the SWR line where the two needles
crossed. No SWR sensitivity adjustment is needed to read SWR.
ANTENNA SELECTOR
The ANTENNA SELECTOR switch allows the selection of two coax
fed antennas through the tuner or direct, a balanced line/
wire antenna, and a coax bypass position. The balanced line
circuit employs a 4:1 balanced to unbalanced transformer (balun)
specially designed to minimize the power loss and give good
frequency response. The balun uses a high permeability fer-
rite toroid core with a minimum number of turns to give both
good low frequency and high ferquency response.
INSTALLTION
1. Locate the tuner in a convenient location at the operating
position. NOTE: LOCATE THE TUNER SO THAT THE REAR OF THE
TUKER IS NOT ACCESSIBLE DURING OPERAT~ON.
2. Install the tuner between the transmitter and the antennas
as shown in the diagram. Use coax cable such as RG-8/U
between the transmitter output and the S0-239 connector
marked TRANSMITTER on the tuner.
(OPTIONAL}
SWRIWATl
EXCITER
AF AMP.
MFJ-8828
METER
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3. Connect the antenna(s) to the tuner as follows:
A. Coax cable feed lines to the coax connectors. Up to
two coax lines may be connected to the tuner at the
same time.
B. Balanced feed lines are connected to the terminals
marked BALANCED LINE.
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C. Random wire antennas or single wire lines are connected
to the WIRE terminal. Install a jumper between the
binding posts as marked on the tuner when using wire ant.
NOTE: ROUTE ALL SINGLE WIRE AND BAL. LINES TO PREVENT
RF BURN HAZARD.
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