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Old 10 April 2008, 18:37   #1
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Can a thru hull transducer be used in hull?

As the title suggests really, due to my vast marine electronics knowledge!

I have been looking for a transducer and wondered if a thru hull/in hull transducer can be used inside the hull so I dont have to cut a hole....and sink the boat!
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Old 11 April 2008, 03:40   #2
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Yes, despite what the manufacturers say just stick it in with some B&Q sealant, avoid any bubbles in the sealant though.

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Old 11 April 2008, 03:41   #3
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"Paging JW, Paging JW"

Mr Garmin says.... use epoxy... http://www8.garmin.com/support/faqs/faq.jsp?faq=119
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Old 11 April 2008, 05:11   #4
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In terms of the acoustics - yes no problem.

However as correctly pointed out by Pete bubbles are an issue since they will all act as small reflectors and give a confused near surface signal to the head unit. This is partly why epoxy is recommended as it is often low enough viscosity with slow enough cure time to allow bubbles to rise out of the mix. If you can, slow the cure of the epoxy down whilst de gassing. This can often be done by pouring it into a shallow, flat tray, rather than leaving it in the mixing pot. This stops the exotherm speeding up the cure. Vacuum degassing is best, but not everyone has access to this kind of kit
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Old 11 April 2008, 08:49   #5
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cool thank you

Any recommendations for a navman 8120?
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Old 11 April 2008, 12:23   #6
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Quote:
Originally Posted by Jono View Post
"Paging JW, Paging JW"

Mr Garmin says.... use epoxy... http://www8.garmin.com/support/faqs/faq.jsp?faq=119
Quote:
Originally Posted by AndrewH View Post
In terms of the acoustics - yes no problem.

However as correctly pointed out by Pete bubbles are an issue since they will all act as small reflectors and give a confused near surface signal to the head unit. This is partly why epoxy is recommended as it is often low enough viscosity with slow enough cure time to allow bubbles to rise out of the mix. If you can, slow the cure of the epoxy down whilst de gassing. This can often be done by pouring it into a shallow, flat tray, rather than leaving it in the mixing pot. This stops the exotherm speeding up the cure. Vacuum degassing is best, but not everyone has access to this kind of kit
Not sure even JW can top that explanation!

Some people experiment with silicone sealant for location and then commit with epoxy once best spot is found.
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Old 11 April 2008, 12:54   #7
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Old 11 April 2008, 13:07   #8
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sorry JW - not trying to steal your crown
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Old 17 April 2008, 12:41   #9
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Found some good crimp connectors for this job. They are closed end butt splices for telephone wires. Filled with a self sealing gel that encapsulates when you crimp making a airtight and watertight seal. About the size of a large pea. Crimped with ordinary pliers
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Old 09 August 2008, 14:40   #10
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recently glued a navman triducer in the keel of my boat with silicone and it works great! it had a hall effect paddle wheel which i took off as sat lower than the main sounder but no problems at all!
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