Shielding typically involves using metal to prevent noise signals from entering your radio. This could mean
using a metal cabinet (instead of a plastic cabinet) or using coaxial cable (instead of ladder line feedline). With
having an inboard engine in a boat with a nonmetallic hull, it means shielding the engine. To do so, you must shield
the entire engine compartment with copper or bronze screening.
If the system is grounded, the typical "ground hum" should not plague your radio. See the section on
grounding for more information on installing a good ground.
Even if you can't eliminate all of your noise problems, you might be able to avoid them by moving your
antenna. On a vehicle, you should move the antenna as far from the engine compartment as
possible. In a base location, it could mean moving the antenna from the front yard to the
back to keep it from being nearby and parallel to noise-producing power lines.
87
The SGC Building, 13737 S.E. 26th St. Bellevue, Washington 98005 USA
P.O. Box 3526, 98009 Tel: (425) 746-6310 Fax: (425) 746-6384
© 1997 SGC Inc.
Sometimes, simply
moving the antenna
reduces noise.
SHIELDING
GROUNDING
MOVING THE ANTENNA
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