
electrical or i n d u s t r i a l n o i s e s o u r c e . E l e c t r i c a l a p p l i a n c e ,
electric motor or fluorescent lighting noise may cover upweak or even
very strong signals.
6.
The SG-230 is a remarkable antenna coupler that will tune practically
any antenna-good or bad. Keep in mind that it is not the coupler that
will radiate the RF energy, it is the antenna. Therefore, use only good
size wire and long antennas.
7.
Never use a feed line or coaxial cable at the output of the antenna
coupler. The function of the coupler is to couple the radio to the
antenna and not to use it as a mid point connector. The antenna system
starts at the output to the coupler. Therefore, the lead end from the
coupler to the hypothetical antenna is part of the antenna system.
Avoid having the lead end wire touch any other metal structure, as it
will capacitively short your antenna to ground.
8.
The backstay of your mast is the only viable antenna on a sailboat. The
SG-230 coupler is specifically designed to be used for such applications.
9.
For vehicular installation, do not use any inexpensive CB antennas
and/or mounts. These antennas will not perform well between 1.8 to 10
MHz even though the coupler will load and tune the antenna whip. A
very high voltage of 15 to 30,000 volts RF will be applied to the antenna
depending on the RF power level and frequency. The inexpensive ball
mounts for CB antennas are not designed for this stringent a purpose.
The use of an antenna system, such as the SG-303 or SG-307, is highly
recommended as it was specifically designed for extreme applications.
6
6..1
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System installation is a three part process covering the following steps:
a)
Selection and installation of the antenna
b)
Mounting the antenna tuner
c )
Connecting the appropriate interface cables between the tuner and the
transceiver
This manual section will discuss the three steps mentioned above in detail and
will provide sufficient information to enable the user to confidently install a
complete system properly.
The antenna system is a key part of the communication system and for satis-
35
© 1998 SGC Inc
SG-230 Manual
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USA
P.O. Box 3526, 98009 Fax: 425-746-6384 Tel: 425- 746-6310 or 1-800-259 7331
E-mail: [email protected] Web site: http://www.sgcworld.com