A MARINE RADIO IS ONLY AS GOOD AS ITS ANTENNA
Knowledgeable boaters realize that even the most expensive radio will perform poorly with a second rate antenna that saves money up front, but jeopardizes the welfare of those aboard. That’s why they prefer the quality, performance and reliability of Shakespeare marine antennas. From the largest seagoing ships to the smallest bass boats, Shakespeare antennas have held up for years and years under the worst marine conditions, always performing to their maximum design capabilities.
R E L I A B I L I T Y B E G I N S WITH QUA L I T Y C O N S T RUCTION
Shakespeare fiberglass antennas are built with precision, beginning with hand-soldered connections, brass and copper elements, strong mechanical joints and superior electronics. The radiator and electrical elements are then encased in an exclusive Shakespeare
fiberglass radome.
TIPS ON CHOOSONG THE PROPER ANTENNA
Since there are many factors that influence the selection of a proper antenna for a specific application, we encourage consultation with a local dealer, whenever possible. When this is not possible, the following tips should be considered before making a final decision.
A n t e n n a L e n g t h
Height is paramount in getting the greatest range, and encourages the choosing of an antenna that can be placed as high as possible on the boat.
S a i l b o a t s :
As a general rule, sailboats have a 3' - 5' antenna mounted on the masthead. Some racing enthusiasts opt for an 8' antenna mounted on the stern in the event demasting should occur. Either is acceptable. A decision should be made on personal preference.
Po w e r b o a t s :
Most power boats from 16' to 25' in length use a standard 8' antenna, while bigger vessels have the option of larger antennas with more gain. Caution: be sure to allow enough lay down room for clearing low bridges or other limitations. Whichever choice is made, a sturdy mounting arrangement must be used to avoid damage to both boat and antenna.
G a i n
This is a rating stated in decibels (dB). Generally, the higher the gain, the greater the communicating range. However, keep in mind that the higher the gain, the more compressed the beam width becomes (see illustration). A narrow beam can cause fading in rolling seas. Small, lightweight boats, which roll excessively in heavy seas, normally do not use a gain rating above 6dB. The more stable the platform of a vessel, the higher the gain that can effectively be used.
Mounts
Be sure to pick the mount style that will best support the antenna on a particular boat. When using a two-piece antenna system greater than 10' in length, an upper support clamp is necessary.
For antennas of 14' to 18', the upper clamp should be 3' to 5' from the bottom. For antennas of 18' to 23', the upper clamp should be 4' to 8' from the bottom. Positioning the upper clamp too high or too low can significantly increase the potential for structural failure.
C a b l e
RG-58 cable is sufficient for cable runs up to 20'. For runs over 20', larger and better, low loss RG-8/X, RG-8A/U or RG-213 are preferable. Shakespeare uses Low loss, UV stable RG-8/X throughout its Galaxy antenna line.
Today’s enchanced cellular services, which operate in the 1800- 1900 MHz range, place even more importance on using a high quality caox. That’s why Shakespeare developed its exclusive Lo-Max™ cable for dual band cellular antennas. Its low loss characteristics are near those of larger RG-8A/U and RG-213 cables, without the extra bulk and rigidity.
For optimum performance from your VHF, HF/SSB and cellular communications systems, the cable should be kept as short as possible. Caution: cable supplied with some antennas may not be cut or altered. Be sure to check the instruction sheet before attempting to shorten the cable.
L o w A n g l e R a d i a t i o n
Shakespeare pioneered low angle techniques in marine antennas in the 1960s and built them into many models. Low angle minimizes fading while maximizing range even during excessive boat roll in turbulent seas. A normal angle shortens the range and wastes power.
Shakespeare
combines a normal beam width with a unique low angle of
radiation to minimize signal fading in rough or rolling
seas.
A F I N A L WORD
The greatest tip to keep in mind is that no matter how much you pay for your radio, its performance will be directly proportional to the quality and performance capabilities of the antenna. Don't compromise...insist on genuine Shakespeare.
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