Kenwood TM-241A Instruction Manual page 9

4-2-2 Fixed Station
A regulated DC power supply (13.8 VDC capable of
supplying at least 11 amperes) is required. PS-33 is
recommended.
outlet until 81 other connections have been
made.
2. Before connecting and disconnecting the power
connector,
be sure to turn
OFF the POWER:
switches of both the transceiver and the DC
power supply.
| 3. Observe polarity of the DC power cable. The
' transceiver operates on 13.8 VDC, negative
ground. Battery polarity must be correct. The
power cable is color coded :
Red — + (Positive polarity)
Black —^ — (Negative polarity)
4-2-3 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).
injury,or damage to the radio itself.