VHF Marine Antennas

The importance of antennas and how they are made. Performance and power delivery.

A radio equipment is as good as its antenna. It is a maxim of communications by VHF or BLU. And taking into account that these teams are fundamental nautical emergencies, having the proper antenna requires discarding those economic sticks which only adorn the gunwale of the boat without greater utility.

An antenna is a set of wire or brass pipes, receivers of radio waves coming from all directions, and they connect to the VHF through a coaxial cable and a connector or plug, sometimes welded to coax or other pressed him.

Some antennas have a series of welded copper elements one after another in collinear order: the more of these there are, the greater the radiated power. And higher installation, increase the reach to the horizon.

The decibel or dB is a measure used to indicate the profit and the increase in the power output of the VHF antenna. For example, 3 dB equals twice the output power; 6 dB, on the other hand, equal to 4 times that power. Other antennas, manufactured with radiating elements of spirals of copper of variable width, have a power output of 6 dB, poermite listen to great distances. A quality antenna focuses radio waves that are lost up on a low trajectory in the direction of the horizon up to 18 miles.

But if you replace an antenna of the whip of one handheld VHF with another of three meters in height with its connectors adapter corresponding, you will need a remarkable improvement in scope and power.

The performance of an antenna that is tell the delivered power – is done with a special instrument called a SWR or Standing Wave Ratios. When the measure yields a 3:1 performance is bad, when the measure is 1, 5:1 or less, is very good.

At the time of buying an antenna for fishing, know these measurement values and the materials used in their construction, they ensure a good choice.

Gallery

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VHF Public Safety, MURS, Marine, & Scanner Slim Jim ...

Source: www.jpole-antenna.com

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Pin Vhf Dipole on Pinterest

Source: www.picstopin.com

SHAKESPEARE QC-8 QuickConnect™ VHF Antenna

SHAKESPEARE QC-8 QuickConnect™ VHF Antenna

Source: www.westmarine.com

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Buy an Oricom UHF2500 2 watt Waterproof Handheld UHF CB ...

Source: oricom.com.au

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Lifejacket with intergrated AIS - MOB1

Source: marine-electronic.ch

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Buy an Oricom HP200 Hotel Phone with Message Wait ...

Source: oricom.com.au

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Mercury 300 HP Pro XS V8

Source: www.hitechmarine.com.au

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Slim Jim / J Pole Antenna Calculator

Source: m0ukd.com

Motorola SLR 5700 VHF 136-174 MHz Repeater

Motorola SLR 5700 VHF 136-174 MHz Repeater

Source: www.radioparts.com

KRU XF Junior Lifejacket

KRU XF Junior Lifejacket

Source: www.youboatmarine.com

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USB DVB-T2 receiver TV HD H.265 HECV MPEG5 (germany)

Source: uk.passion-radio.com

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Mounting ideas for VHF/UHF Antennas

Source: www.jpole-antenna.com

Petrol Jerry Can – Red (5Ltr) by Car Plan

Petrol Jerry Can - Red (5Ltr) by Car Plan

Source: www.arthurschandlery.co.uk

YouBoat Chandlery

YouBoat Chandlery

Source: www.youboatmarine.com

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4353 Classic AM/FM Antenna

Source: shakespeare-ce.com

MRF477 – Uniden RF Power Transistor

MRF477 - Uniden RF Power Transistor

Source: www.bearcatscanner.com

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Aviation (Airband) 118 – 128 MHz J-Pole Antenna

Source: www.jpole-antenna.com

2004 33′ Palmetto Custom Boats 33 Adventure CC for sale in …

2004 33' Palmetto Custom Boats 33 Adventure CC for sale in ...

Source: fortpierce.preownedyachts.us

Satellites Prepared By: Muhamad Hisham Hamidon

Satellites Prepared By: Muhamad Hisham Hamidon

Source: slideplayer.com

Shakespeare® Skinny Mini™ VHF Marine Band 3 dB Gain …

Shakespeare® Skinny Mini™ VHF Marine Band 3 dB Gain ...

Source: www.academy.com