2-1. antenna – Kenwood TM-741A User Manual
Page 9
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3-1-2. Mounting Bracket
Notes
1. When installing the transceiver in a vehicle
consider ease of operation and safety when selecting
the location for the mounting bracket.
2. Install the bracket securely so that it will not come
off due to vibration.
1. Install the bracket
using the supplied flat
washers and self
tapping screws (4 pcs.
each).
2. Attach the transceiver
loosely using the
SEMS screws (4 pcs.).
3. Adjust the viewing angle of the bracket to the desired
position.
3-2-1. Antenna
The type of antenna that is used will greatly affect the
performance of the transceiver. Use a properly adjusted
antenna, of good quality, to enable your transceiver to
perform at its best. The antenna input impedance is 50
ohms. Use 50-ohm coaxial cable such as RG-8U or 8D-
2V for this connection. If the antenna is far from the
transceiver the use of low loss coaxial cable, such as RG-
8U is recommended. Match the impedance of the coaxial
cable and that of the antenna so that the SWR is less
than 1.5 to 1. The protection circuit in the transceiver
will activate if the SWR is particularly poor (greater
than 3 to 1).
High SWR values will cause the transmitter output to
drop, and may lead to TVI or BCI reports.
3-2. CONNECTION
Caution;
We recommend that you install a high quality
lightning arrestor in your antenna lines for
protection against fire,electric shock,personal
injury,or damage to the radio itself.
Hold the transceiver in place and tighten the 4 SEMS
screws using the supplied wrench.