| | Depth Transducer - 2009/05/17 17:09
I want to fit a new depth transducer but find that the current one is, I think, glassed into the moulded receptacle on the forward keel line (which appears to be an ideal location). My questions are:
Is there a magic way of getting the old tranducer out?
Should it be drilled out and a new one glassed in?
Would I be better fitting the new one in a different location?
Many thanks
Brian
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| | Re:Depth Transducer - 2009/05/21 06:22
Hello Brian
I asked a similar question 2 months ago and no reply yet?!
I did drill out my transducer, it was held in place by large amounts of sealant, it took quite a while to remove which was comforting in a way.
I would start with a pilot hole rather than trying to remove it "all in one" it is easy to drift off centre.
I had a NASA unit which is considerably narrower than a Raymarine transducer.
Hope this helps,
Guy.
http://worldwidewaites.blogspot.com/
http://www.flickr.com/photos/7164031@N04/
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| | rhys griffiths
Junior Boarder | | | | Re:Depth Transducer - 2009/05/25 19:49
Hi Brian, I went through all this a few years ago. I couldn't find a transducer to fit the original hole so I glassed the inside and filled the hole.
The lady in the shop said I needed to cut a new hole in the hull to take the new transducer - lucky I didn't listen to her as this is bollocks. The transducer will work fine from inside the hull providing there are no air bubbles in the GRP.
I situated my new transducer (came with Raymarine instrument - I think the transducer is made by Airmar) low down in the locker beneath the cooker. I used a piece of plastic piping 3-4'' wide and cut the bottom to the shape of the hull so the pipe stood vertical. I glassed this to the bottom of the boat. I poured in a little glycerine (I think) oil - so there is a continous medium between the transducer and the hull. I then put a plywood plug inside the top of the pipe to stop escape of the oil on extreme heel.
This has worked fine for me over the last few seasons, but sometimes there is loss of signal when heeled a lot - usually a sign that it is time to reef.
I'm sure other people have other ideas but this has is how I did it - I hope it is of some help.
Don't go cutting holes in the hull!
Best wishes, Rhys
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| | Re:Depth Transducer - 2009/05/27 14:44
Many thanks for your replies Guy and Rhys, I can now deliberate on a way forward. Suffice it to say I will not be drilling any holes through the hull!
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| | Re:Depth Transducer - 2009/06/18 05:38
I was concerned about laminate thickness with regard to "in-hull" depth transducer location and contacted Airmar (who make transducers for most instrument munufacturers inc. Raymarine).
Here is their reply....
The P79 transducer is capable of receiving up to 600W of power. If it is used with a display device that suppiles 600W of power, it is typically able to penetrate 3/4" of solid fiberglass. If however, the P79 is used with a low powered instrument such as a Standard Horizon or Raymarine ST40 or ST60 display, these types of digital instruments only supply approximately 50W of power to the P79. When operating at low power, the transducer may only reliably penetrate through 3/8" of solid fiberglass.
Good luck,
Guy.
http://worldwidewaites.blogspot.com/
http://www.flickr.com/photos/7164031@N04/
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