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Old 10 October 2014, 03:51   #11
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Where are you going to mount your VHF?
I have a console so its going somewhere there. I've not been down to the boat since it arrived to work out where.


jky - fair points. I have a handheld that I currently use, and given the recent change in the weather I think there will be plenty of time for playing with mounting ideas before I play with the boat again anyway. Heightwise - does the base really want to be above any wave/swell height we expect?

SPR's maths show communicating to a good mast high on land is "easy" but I guess I'd also like to be in range of WAFI's who might be the only people around, I've no idea how many CG masts are in the right place, at the right height.
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Old 10 October 2014, 04:07   #12
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Here's a small boat aerial

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Old 10 October 2014, 07:51   #13
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You could always look at the V-tronix RIB antenna and mount it on a pole (think broom handle). Then you could fix two U brackets on the transom (or side of the console) that the pole slides into, making it removable for transport or storage.


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Old 10 October 2014, 08:38   #14
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On my old SR4 I used a bit of "tough" (i,.e underground type waste pipe. I then used a blanking cap drilled for the base. I then fitted two stainless pipe holders to the transom to hold it up.

I lived with a loop of cable so I could pull it out for travel / garage door avoidance. I sold the boat not long after, so never got round to fitting the Bulgin Buccaneer to the bottom of the pole which would mate with one on a bracket and then screw in to hold the mast in. I taped some thin rope (3mm or so plait) above the top bracket and lashed it down to the bracket to stop it falling out (vibration lifting it) while I sourced the Buccaneer. - that survived two trips and someone made me an offer for the huill I couldn't refuse so can't tell you how the "Buccaneer mount" plan would have worked.....
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Old 10 October 2014, 12:01   #15
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Heightwise - does the base really want to be above any wave/swell height we expect?
Base doesn't matter; it's the radiating portion that needs to be up. In glass antennas (Shakespeare, etc) there is an array of elements normally about a foot and half long (rough guess) that sits about 1 to 2 feet from the tip of the antenna. Don't know much about the base-loaded designs, but I assume the wire aerial part is actually doing the radiating, so again, base wouldn't matter (assuming I'm correct about how they work.)

jky
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Old 10 October 2014, 13:51   #16
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Thanks guys ;-)

It seems Andy beat you to it though: http://cdn.rib.net/forum/attachment....2&d=1321661565
Where ever did you trawl that one up from?
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Old 10 October 2014, 14:01   #17
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Where ever did you trawl that one up from?
:-) I was searching for solutions following SPRs helpful answer and stumbled across it!
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Old 10 October 2014, 14:36   #18
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:-) I was searching for solutions following SPRs helpful answer and stumbled across it!
My son isn't thanking you for that!
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Old 10 October 2014, 15:24   #19
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This link has some good info regarding antenna design. Anatomy of a Shakespeare Galaxy antenna

Quote:
Originally Posted by Ovey View Post
You could always look at the V-tronix RIB antenna and mount it on a pole (think broom handle). Then you could fix two U brackets on the transom (or side of the console) that the pole slides into, making it removable for transport or storage.
A fishing pole mount works awesome! My boat came with two of them and I repurposed the starboard side one to hold my aluminum dive flag pole (Shown in my first photo above, and made from free recycled material ), plus I have an all around white navigation light pole that slides in the bracket.
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Old 10 October 2014, 17:20   #20
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+1 for a multi-piece collapsible stainless steel 316 light pole and Metz antenna!
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