Kenwood TS-130SE - Manual (Page 16)

(1) Antenna Location Selection
Since ignition noise is generated by the vehicles engine, the
antenna must be installed as far from the engine as possible.
(2) Antenna Matching
In general, mobile antennas have a lower impedance than
50-ohm coaxial cable, resulting in a mismatch between the
antenna and the coax. Such trouble can be eliminated by
using an antenna tuner between the TS-130SE and the
coaxial cable.
O Matching Circuit Examples
INPUT
o-
7 ' 7 'ouT PUT
o—<-
I
INPUT I
l
o o—
OUTPUT
Fig. 4-12 Matching Circuits
(3) Bonding
The component parts of motor vehicles, such as the engine,
transmission, muffler system, accelerator, etc., are coupled
to one another at DC and low frequencies, but are isolated at
high frequencies. By connecting these parts using heavy,
braided ground straps, ignition noise can be reduced. This
connection is called "bonding".
(4) Use Ignition Suppressor Cable or Suppressor Spark
Plugs
Noise can be reduced by using spark plugs with internal
resistors, or resistive suppressor ignition cable.
(5) Battery Power Connection
It is recommended that battery power be supplied directly to
the TS-130SE from the battery terminals.
CAUTION:------------------------------------------------------------------- —
Disconnect the TS-130SE before jump-starting or before
charging the battery.
(6) Battery Capacity
The power system of a motor vehicle is comprised of a
battery and an alternator (which generates power while the
engine is running) to supply current to loads or to charge the
battery.
Since the transceiver draws high current during transmit,
care should be excersised so the power system is not
overloaded. When using the transceiver, the following
points should be observed from the viewpoint of battery
maintenance:
(X> Turn the transceiver OFF when the lights, heater, wipers
and other high-draw accessories are used.
(D Avoid transceiver operation when the engine is not run­
ning.
(D If necessary, use an ammeter and/or a voltmeter to
check battery condition.
4.9 FIXED STATION OPERATION
4.9.1. Power
The TS-130SE requires more than 18A at 13.8 VDC when
transmitting with full power. Use the model PS-30 power
supply for fixed stations.
For HF fixed-station operation, an antenna specifically
designed for amateur operation is recommended. Antenna
types include the wire antennas, verticals, rotary beam, and
other antennas. HF antennas are quite large and must be in­
stalled to withstand strong wind, heavy rain, etc.
Any antenna used with the TS-130SE should be of 50-
ohm impedance and should be connected using an ap­
propriate coaxial cable such as RG-8/U.
Impedance matching is important. Impedance mismatching
will result in a high VSWR and power loss, or can cause un­
wanted harmonic radiation and interference (TVI, BCI).
The impedance match can be checked with an SWR meter.
Generally satisfactory operation is assured when the VSWR
(Voltage Standing Wave Ratio) is less than 1.5:1.
For impedance matching between the antenna system and
transceiver, use of the AT-130 Antenna Tuner (option) is
recommended. A rotary beam antenna is very effective for
DX operation in the 14, 21 and 28 MHz bands. (Fig. 4-13)
NOTE: ---------------------------------------------------------------- ----------
Protect your equipment — use a lightning arrestor.
16