NexxTech 2100972 Installation

The Nexxtech Magnetic Mount Mobile CB Antenna mounts
securely to any flat magnetic metal surface. The magnetic base
stays in place at normal highway speeds. Your antenna can
handle a maximum power output of 25 watts.
The antenna was designed for use on all 40-channel CBs or
with a 30' (10 m) amateur radio transceiver. You can adjust the
stainless steel whip for the lowest standing wave ratio (SWR) and
maximum RF signal radiation.
PARTS LIST
Description
(1) Whip assembly
(2) Spring Adapter
(3) Magnet/Cable Assembly
(4) Set Screw
(5) Allen Wrench
Quantity
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Magnetic Mount Mobile CB Antenna
INSTALLATION
Installing the bracket
1. Choose a clean, flat magnetic metal surface for your antenna
location.
Caution: Do not mount your antenna on a vinyl-covered
surface.
2. Route the coaxial cable from the magnet/cable assembly (3)
to your CB. Be sure that the cable does not get pinched in
doors or windows.
Note: In some installations, the distance from your antenna
to your CB might be greater than the length of the supplied
coaxial cable. Your local electronics store has a selection of
cable and connectors.
3. Connect the antenna cable plug to your CB/Ham Transceiver.
4. Securely screw the whip adapter (2) to the magnet/cable
assembly (3).
5. Insert the whip assembly (1) into the whip adapter (2) and
tighten the set screw (4) with the supplied Allen wrench (5).
Note: Occasionally remove the magnetic base and clean
the contact surfaces with fresh water and detergent.
Condensation trapped between the magnetic base and
mounting surface might discolor the vehicle's finish if the base
is left in one position for too long.
TUNING THE ANTENNA FOR CB
The antenna was designed for full 40-channel operation. To
ensure that the antenna works with a minimum SWR on all
channels on all types of vehicles, we have allowed extra whip
length for proper tuning.
You need an SWR meter, available at your local electronics store,
to properly tune your CB/Ham System.
1. Connect the SWR meter between the CB and the coaxial
antenna cable, as described in the meter's instructions.
2. Measure the SWR on your CB's lowest and highest channels.
If the SWR reading on the lowest channel is higher than the
value in the chart, lengthen the antenna by loosening the set
screw (using the supplied Allen wrench) and pulling the whip
out of the base 1/8 inch (3 mm), then tightening the screw
again.
If the SWR reading on the highest channel is higher than the
value in the chart, shorten the antenna by loosening the set
screw (using the supplied Allen wrench), removing the whip
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SWR
∞
4.0
3.5
3.0
2.5
2.0
1.6
1.5
1.3
1.1
1.0