example

BOAT ANTENNAS AND AERIALS

The aerials listed in this section are all from the Shakespeare V-Tronix and Classic ranges. We only offer Shakespeare antennas because of their high quality and reliability. Choosing the right antenna - When choosing an antenna, height is paramount in getting the greatest range and this is the reason the antenna should be placed as high as possible on the boat. Sailboats: As a general rule, sailboats have a 3’-5’ antenna mounted on the masthead. Powerboats: Most power boats from 16’-25’ in length use a standard 8’ antenna, while bigger vessels have the option of larger antennas with more gain. What is Gain? - 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.

9 dB 3 dB

6 dB

Typical Radiation Patterns

Normal angle Wasted power Shakespeare low angle

ELECTRICAL

RIBs

Motorboats

Commercial

Sailing boats

Fishing boats

Shakespeare combines a normal beam width with a unique low angle of radiation to minimize signal fading in rough or rolling seas.

SHORT HELICAL VHF ANTENNAS (0.15M - 0.31M)

• Designed to be ultra lightweight and still withstand the most rugged punishment • Suitable for race boats or for sailors who want the lowest possible windage • Does not require a ground plane • Integral aluminium fitting • V.S.W.R: 1.5:1 at resonance • 2 year limited warranty

• All vulnerable electrical parts are sealed in epoxy resin to resist water ingress • Low profile, low windage, unobtrusive antenna, which does not require a ground plane • 180mm aluminium bracket • V.S.W.R: 1.5:1 at resonance • 2 year limited warranty

Part no. Model

Frequency MHz

Length metres

Gain dB

RG58 cable length metres

Plug type

Part no. Model

Frequency MHz

Length metres

Gain dB

RG58 cable length metres

Plug type

716524

716520

HA156C 156-162 0.15 3

20

PL-259

MD53 156-162 0.31 3

20

PL-259

EMERGENCY VHF ANTENNA (0.25M)

STAINLESS STEEL VHF ANTENNA (0.9M)

• Emergency VHF antenna for instant set up if your main antenna becomes broken or disabled • It is sealed in waterproof container and can be easily stowed away • Fitted with a rubber suction cap for quick mounting on any smooth, horizontal surface • V.S.W.R: Dependant on location • 2 year limited warranty

• All vulnerable electrical parts are sealed in epoxy resin to resist water ingress • 180mm nylon cranked bracket for masthead mounting • Lightweight • Low windage • V.S.W.R: 15:1 • 2 year limited warranty

Part no. Mod el

Frequency MHz

Length metres

Gain dB

RG58 cable length metres

Plug type

Part no. Model Frequency MHz

Length metres

Gain dB

RG58 cable length metres

Plug type

716587

716512 MD20 156-162 0.90

5911 156-162 0.25

1

3.6

PL-259

3

20

PL-259

716524

716520

716587

716512

50

info@asap-supplies.com

www.asap-supplies.com

01502 716993