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Old 11 January 2010, 16:29   #1
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Vhf antenna length/make?

Hi guys,
I've trawled through past posts but can'tfind one that addresses my question.
I am after an antenna for my 4.6m boat, but cannot decide which length/ make to go for.
I will be using the boat within 10 miles of the shore and already have a handheld radio, so am installing this for better range. However I don't want too long a length for transporting.
The pacific ones on ebay look good (Cheap ), what do you guys think?
Cheers,
Geoff
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Old 11 January 2010, 16:56   #2
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Are you mounting it directly onto the transom?
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Old 11 January 2010, 17:07   #3
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Quote:
Originally Posted by Geoff_Jubb View Post
The pacific ones on ebay look good (Cheap ), what do you guys think?
Pacific antennae are anything but cheap, third best on the market perhaps. Very highly recommended from me at least.

Size really comes into its own for receiving, as a minimum option the 0.3m helical antenna that Pacific do is very good, the Seamaster Pro version even better.

Mounting height is perhaps more important than length.
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Old 11 January 2010, 17:16   #4
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I am thinking of mounting it on the transom, or some kind of instrument mount/console thingy I have yet to concieve. Either way, it will be about transom hieght.
With the pacific antennas, the ones I am looking at seem to start at 25. Is this the same make that you talk of?
Thanks for your help,
Geoff
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Old 11 January 2010, 17:22   #5
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Quote:
Originally Posted by Geoff_Jubb View Post
With the pacific antennas, the ones I am looking at seem to start at 25. Is this the same make that you talk of?
Yes, should be. Mounting low can be a problem, not least of which you have quite a bit of power radiating out when you transmit.
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Old 11 January 2010, 17:30   #6
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Is thr radiated power dangerous?
Does anyone have any ideas for mounting an antenna without an A frame, as mine is a SIB for fishing and I would prefer not to go down that route if possible?
Cheers again for your advice,
Geoff
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Old 11 January 2010, 17:38   #7
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Is thr radiated power dangerous?
Given the small amount you will probably use it to transmit, no. But it is something to think about.

Using a small pole with the antenna on top would be good.
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Old 11 January 2010, 19:48   #8
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As it's going to be sitting at transom height, I'd suggest you go for a 1.5m antenna on a fold down base and fix it on the inside face of the transom.
A pole would be a good solution. You could make the pole removable, if it helps with storage.
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Old 12 January 2010, 09:36   #9
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I had a removable pole on my old boat. Easy to either hinge at the bottom so it folds onto the floor or pull out with an inline waterproof connector.

The main issue I could see with transom height is you will make a very good absorber for the outgoing signal, esp. if you are on 1W ......

Height (above water level!) is good!
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Old 12 January 2010, 09:44   #10
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Pacific do a mount for their Pro range that sits inside 1" tube, the antenna itself is then removable to you do not need an inline connector so long as you are happy with whatever length of tube you go for.

This is the 1m version of the Seamaster Pro...

http://www.pacificaerials.co.nz/Mari...ssAntenna.aspx

The antenna, cable, pole and tube fitting should come to less than 30 quid.
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