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Old 17 October 2008, 16:12   #21
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Originally Posted by Polwart View Post
But you're last point is rather important. A handheld at head height is pretty much at the same height as a fixed unit if the ariel is mounted on the console. Height is much more important than power. 5W should be enough for the sort of range that someone (especially someone new) would take a 4m rib off the coast. If there is a problem communicating I would suggest it is more likely to be a line of sight issue e.g. round a headland, than pure power.
I wouldn't bet on that. There's days when a 5w handheld won't transmit from one end of Poole Harbour to the other.
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Old 17 October 2008, 16:18   #22
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I wouldn't bet on that. There's days when a 5w handheld won't transmit from one end of Poole Harbour to the other.
is that power or height? the harbour is quite big (miles?) and odd shaped isn't it
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Old 17 October 2008, 16:23   #23
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is that power or height? the harbour is quite big (miles?) and odd shaped isn't it
Probably a bit of both plus every braying moron on 25w talking boat to boat in Salterns drowning them out.
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Old 17 October 2008, 16:29   #24
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For a fixed unit on a rib with no A frame wouldn't the console be a little low down for mounting the Ariel?
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Old 17 October 2008, 16:45   #25
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Put a post on the transom with nav lights and ariel on it a la Hightower?
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Old 17 October 2008, 16:55   #26
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a la Hightower?
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Old 17 October 2008, 17:02   #27
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a la Hightower?
http://rib.net/forum/attachment.php?...8&d=1209286773

Something like that but all on one pole?
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Old 17 October 2008, 17:11   #28
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Ahh yeah, I've got a stainless Back ground support that could do the job. Cheers buddy.
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Old 17 October 2008, 17:17   #29
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http://rib.net/forum/attachment.php?...8&d=1209286773

Something like that but all on one pole?
Like this?

Courtesy of a kind fellow RIBnetter because I had to get rid of my A frame (which was a skanky DIY thing anyway) in order to be able to fit the aux.
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Old 17 October 2008, 17:45   #30
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Quote:
Originally Posted by Polwart View Post
But you're last point is rather important. A handheld at head height is pretty much at the same height as a fixed unit if the ariel is mounted on the console. Height is much more important than power. 5W should be enough for the sort of range that someone (especially someone new) would take a 4m rib off the coast. If there is a problem communicating I would suggest it is more likely to be a line of sight issue e.g. round a headland, than pure power.
Power has very little to do with it as you say it's all about height.

here is a chart of range of airborne VHF.

Aircraft height (feet) Maximum LOS distance (nm)
10 ----- 3.2
100 ----- 10
1000 ----- 32
5000 ----- 70
10 000----- 100
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