Technical information
Table Of Contents
- GoMobile Cover
- SGC – The SSB People
- Go Mobile at 500 Watts
- T a b l e o f C o n t e n t s
- I n t r o d u c t i o n
- C h a p t e r 1 C h a n g e s i n M o b i l e R a d i o
- C h a p t e r 2 O r i e n t i n g Y o u r s e l f t o 5 0 0 W a t t s
- C h a p t e r 3 DCP o w e r S u p p l y S y s t e m f o r a M o b i l e I n s t a l l a t i o n
- C h a p t e r 4 A n t e n n a s a n d G r o u n d s
- C h a p t e r 5 N o i s e S u p p r e s s i o n a n d S h o c k -M o u n t i n g
- C h a p t e r 6 I n s t a l l a t i o n P r o c e d u r e s
- C h a p t e r 7 I n s t a l l a t i o n V a r i a b l e s
- C h a p t e r 8 G o i n g M o b i l e a t 1 5 0 W a t t s
- Appendix A — QMS S y s t e m
- A p p e n d i x B — S e l e c t i o n o f E q u i p m e n t
- A p p e n d i x C — T e s t D a t a
- It all Adds Up
provides a reasonable load to a good antenna coupler at all
frequencies from about 1.8 to 30 MHz.
SGC whip with SG-235 coupler. SGC is the only manufac-
turer to add the good attributes of a 108” whip (which per-
forms well at the 20 MHz range and above) with the high
performance of a helical antenna that performs well at the
lower frequencies.
The use of an antenna coupler is required on all but the most
carefully matched center- and top-loaded mobile whip
antennas which present close to a 50 ohm match to the
antenna lead.
Although it is tempting to use both a coupler and a center-
loaded antenna, the center loading element of a loaded
antenna already acts as an RF choke at high frequencies.
Thus, it actually reduces the effective length of an antenna if
used on a high band.
That is why for 500-watt
mobile installation, SGC rec-
ommends its SG-303 whip
antenna, SG-235 antenna cou-
pler, and the Quick Mount
System.
QMS for Mobile Use. The
QMS-3-500 antenna system,
comprising the SG-235
Coupler mounted in a QMS and
driving the SG-303 high per-
formance whip antenna will
typically yield substantial
improvement in performance
over a conventional 1.8 to 30
MHz HF mobile antenna
installation. When we start
making claims of 20 dB, a lot of people (maybe even you)
18
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
P.O.Box 3526, 98009 Fax: 425-746-6384 or 746-7173 Tel: 425- 746-6310 or 1-800-259 7331
E-mail: SGCMKTG@aol.com Website: http://www.sgcworld.com
© 1997 SGC Inc.
Figure 5 — The QMS
attaches securely to the
GEO Metro