Kenwood TS-670 Instruction Manual page 25

Antennas in Fixed Station:
me
—
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Beam antenna
Ground plane antenna
oe
Dipole antenna
@ 4-14 MOBILE STATION OPERATION
Mobile mount
Under dashboard of passenger seat
Install under dashboard
ANTENNAS
For HF fixed-station operation, an antenna specifically
designed for amateur operation is recommended. Antenna
types include wire antennas, verticals, rotary beams, and
other antenna types. HF antennas are quite large and must
be installed to withstand strong winds, heavy rain, etc.
Any antenna used with the TS-670 should be of 50-ohm
impedance and should be connected using an appropriate
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.
A rotary beam antenna is very effective for DX operation in
the 14, 21, 28 and 50 MHz bands.
NOTE:
Protect your equipment-use a lightning arrestor.
NOTE:
VSWR stands for voltage standing wave ratio.
INSTALLATION
Secure the TS-670 under the dashboard using the optional
MB-430 mounting bracket (shown on page 31). As an
alternative, use strapping, making sure that the TS-670
will not slip out of place while operating the vehicle.
NOTES:
1. Do not install the TS-670 near the heater outlet.
2. Allow sufficient space behind the TS-670 to ensure
proper ventilation.
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