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18 September 2014, 00:47
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#1
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Member
Country: Australia
Town: Australia
Boat name: none
Make: JP Marine 3.8 Patrol
Length: 3m +
Engine: Tohatsu 18hp 2stroke
Join Date: May 2013
Posts: 69
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Mounting VHF arial on a SIB
I have a SIB with a Tohatsu 18 hp manual start motor. Is there any reason why I shouldn't mount a 1.8m (6ft) high arial on the transom. I do not want to install an A frame.
Is the motor likely to cause interference.
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18 September 2014, 07:08
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#2
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,872
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An often asked question. Fix the antenna to a cycle helmet and strap it to your bonce. It gives added height.
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18 September 2014, 07:21
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#3
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Member
Country: Australia
Town: Australia
Boat name: none
Make: JP Marine 3.8 Patrol
Length: 3m +
Engine: Tohatsu 18hp 2stroke
Join Date: May 2013
Posts: 69
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I take it you were just taking the piss as your post doesnt really answer my question
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18 September 2014, 09:27
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#4
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Member
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
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Quote:
Originally Posted by seasdes
Is the motor likely to cause interference.
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Probably.
The antenna would also be close to your head
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"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
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18 September 2014, 09:51
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#5
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Member
Country: Australia
Town: Australia
Boat name: none
Make: JP Marine 3.8 Patrol
Length: 3m +
Engine: Tohatsu 18hp 2stroke
Join Date: May 2013
Posts: 69
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Great I love fried brains
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18 September 2014, 10:59
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#6
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Member
Country: UK - Wales
Town: Cardiff
Length: no boat
Join Date: Aug 2014
Posts: 2,018
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Where will you mount the radio?
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18 September 2014, 12:07
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#7
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Member
Country: Australia
Town: Australia
Boat name: none
Make: JP Marine 3.8 Patrol
Length: 3m +
Engine: Tohatsu 18hp 2stroke
Join Date: May 2013
Posts: 69
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In a battery box that will sit on the floor.
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18 September 2014, 12:14
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#8
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Member
Country: Australia
Town: Australia
Boat name: none
Make: JP Marine 3.8 Patrol
Length: 3m +
Engine: Tohatsu 18hp 2stroke
Join Date: May 2013
Posts: 69
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Attached is current setup
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18 September 2014, 15:09
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#9
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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What's the white board up front? Can you mount the antenna there?
I do seem to recall someone mounted their antenna to the motor cover; didn't see them very often (and not within the last 7 years.)
jky
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18 September 2014, 15:41
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#10
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Member
Country: UK - England
Length: 6m +
Join Date: Jan 2011
Posts: 55
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Mount a whip antenna on an extension pole fixed to the transom. The radiating element will be above the motor, you'll benefit from extra height above sea level and the broad radiation pattern of a whip is better for an unstable platform such as a boat than the focused pattern of a fishing rod antenna.
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18 September 2014, 15:47
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#11
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Member
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
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I put a VHF aerial on a 13 ft boat and everybody took the p*ss, saying it looked like a radio-controlled toy.
__________________
"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
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18 September 2014, 16:57
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#12
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Member
Country: USA
Town: NorCal
Boat name: SHARKY
Make: AB
Length: 4m +
Engine: Honda BF75 & BF5
Join Date: Dec 2009
Posts: 1,912
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I have a radio controlled toy with an 8ft antenna mounted to the transom. Works great! I can send and receive from decent distances. As you can see in the photo I put it on the port side, and have an aluminum pole for my dive flag on the starboard side. The antenna folds perfectly into the boat, and is mounted to the transom with stainless wood screws. If it ever comes loose, I will use a plate of stainless as a backer, but it has been that way for years...
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18 September 2014, 22:27
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#13
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Member
Country: Australia
Town: Australia
Boat name: none
Make: JP Marine 3.8 Patrol
Length: 3m +
Engine: Tohatsu 18hp 2stroke
Join Date: May 2013
Posts: 69
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The white board is 19 mm plastic (chopping board). Arial is mounted to thi and works fine. However, I may be buying new hull that does not have D rings, so I am wondering what to do about arial.
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19 September 2014, 04:19
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#14
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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Quote:
Originally Posted by Peter_C
I have a radio controlled toy with an 8ft antenna mounted to the transom. Works great! I can send and receive from decent distances.
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Yeah, unless you see basking sharks...
jky
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21 September 2014, 20:44
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#15
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Member
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
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Mounting VHF arial on a SIB
Rnli,s D class sibs have the vhf aerial mounted on the inside of the transom along with the nav light pole.
Though its better to bolt it on the outside rather than inside part of the transom it just limits you not being able to drop /lower it down inside the boat should the need arise such as putting a boat cover over , unless you screw it off & on .
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22 September 2014, 05:24
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#16
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Member
Country: USA
Town: NorCal
Boat name: SHARKY
Make: AB
Length: 4m +
Engine: Honda BF75 & BF5
Join Date: Dec 2009
Posts: 1,912
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Quote:
Originally Posted by m chappelow
Though its better to bolt it on the outside rather than inside part of the transom it just limits you not being able to drop /lower it down inside the boat should the need arise such as putting a boat cover over , unless you screw it off & on .
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My antenna bolts on the inside of my transom and folds right into the boat, so I can put a cover on. Nothing sticks up at all, and the antenna is safely tucked inside the tube.
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22 September 2014, 09:12
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#17
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RIBnet Supporter
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,684
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Quote:
Originally Posted by jyasaki
Yeah, unless you see basking sharks...
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 Someone been keeping secrets JY? I know one of those too - "Hey, guess what! We saw Orcas yesterday!" 
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I'm sorry, but there IS no Mars Bar.
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22 September 2014, 15:45
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#18
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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Quote:
Originally Posted by willk
Someone been keeping secrets JY? I know one of those too - "Hey, guess what! We saw Orcas yesterday!" |
Did a dive with Pete and his buddies; they took off while we moved for another dive in the area. Found out later they had seen basking sharks (pretty uncommon these days where we are) just around the corner from us. Pete put pics up on RIB.net somewhere.
jky
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22 September 2014, 15:48
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#19
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Member
Country: USA
Town: NorCal
Boat name: SHARKY
Make: AB
Length: 4m +
Engine: Honda BF75 & BF5
Join Date: Dec 2009
Posts: 1,912
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Quote:
Originally Posted by willk
Someone been keeping secrets JY? I know one of those too - "Hey, guess what! We saw Orcas yesterday!" |
It wasn't a secret. JY told me the channel to check up on the whale watching boats that spotted the basking sharks. I am just amazed that he has so many dives in Monterey Bay and has never seen one. They are slowly making a comeback after man almost wiped them out here.
That was also my friends C-Dory, which of course has the antenna even higher off the water.
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