New depth sounder - Old transducer??? - SailNet Community

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  #1  
Old 06-12-2009
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New depth sounder - Old transducer???

My boat has an old Lorad (neon tube indicator - you know, the spinning type - 70's technology) depth sounder with a transducer epoxy mounted inside the boat on the fiberglass (not thru hull) and it provides just fine a signal. It's frequency is 200 KHz, and the cable has an RCA plug on the indicator.

I'm considering replacing the Indicator with a Raymarine ST40, which also operates at 200 KHz, but uses a "spade" plug on the indicator.

The $500 question is: Is this doable? If so, cutting the cable to change the plug type will cause significant loss of signal?

I'd rather not mess with the installation of a new transducer, if possible, as I don't have any experience with epoxies and do not want to drill a new hole on the hull. Does anyone have any comments? Thank you in advance.
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Old 06-12-2009
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Change the connector and try it. If it works, great, you're finished. If not, knock the old transducer off and install the new one - it's easy. See this link;
http://www.westsystem.com/ss/assets/...pthSounder.pdf
Mixing epoxy is no more difficult than mixing two liquids together and applying.
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Old 06-17-2009
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Connector type is not sensitive for the 200khz transducer as long as there is a good connection. I used gold plated pins on the end of a Humming bird transducer that I epoxied to the inside of the hull. The Raytheon connector was a female 2 pin. I just covered the connector with a small plastic bag to protect it, soldered the pins to the end of the hummingbird cable and poked the connectors through the plastic into the female connector. The transducer was checked, worked. I used stick epoxy to form a connector end on the cable and did not want the epoxy to stick to the Ray connector. ( plastic was the release agent). When the epoxy cured, unpluged the new epoxy ended connector, removed the plastic bag from the end where the pins poked through. It is removable if needed, Its worked for over 10yrs......
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Old 06-17-2009
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See this thread

See this thread: Old Transducer New ST-60 (LINK)
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