[Sentoa] Raytheon V850 Color Echo Sounder

[John Gallagher]

Jack

It looks like you are getting lots of things to check so I'll add another
to your list.

Are the temperature and speed ok?

As has been mentioned previously turbulence is a likely culprit. Perhaps
there is a tuft of growth just ahead of, or on the the transducer causing
this. Usually bottom paint is not put on the transducer. Perhaps you can
lie on the dock and give it a wipe with a deck brush.

I got an underwater video camera on ebay a couple of years ago that is
really handy for checking that sort of thing.

Have Fun

John Gallagher
RADIANT
32-068




>  When we pulled the old transducer (which
> should be about the same age as yours) it was delaminating. No wonder it
> failed.?
>
>  Sounds like I need to pull the boat again.? The depth finder, while the
> boat is in the slip, is accurate.? Thanks for your wisdom.
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> Jack Lynn, APR
> 703-683-2996 (office)
> 703-615-9370 (cell)
> Jack Lynn, LLC
>
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>
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>
> -----Original Message-----
> From: Letcher Ross <letcher at corvid.org>
> To: South East Nordic Tugs Owners' Association (SENTOA)
> <sentoa at lists.samurai.com>
> Sent: Sat, Jul 25, 2009 11:23 pm
> Subject: Re: [Sentoa] Raytheon V850 Color Echo Sounder
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> A couple of years ago the V850 on Josephine, 32-108, become flaky and
> worked intermittently. I was in the process of switching out all the old
> Raytheon electronics out at the time and had already installed two
> Garmin Chartplotters. What I decided to do was to replace the V850 with
> a Garmin GSD20 "blackbox" sounder connected to the plotters.?
> ?
>
> First, I learned that almost all transducers are made by Airmar and
> distributed with various brads of sounders. The transducer used by the
> V850 should work fine with the Garmin GSD20. I ordered and installed the
> Garmin unit and plugged the transducer that was already installed into
> it. Guess what? Right, it was still flaky.?
> ?
>
> I then ordered a new Airmar transducer for the GSD20 and when it arrived
> I first tested it by trying it to a line and putting it in the water at
> the dock. It worked as expected. Then I had the boat hauled and
> installed the new transducer. When we pulled the old transducer (which
> should be about the same age as yours) it was delaminating. No wonder it
> failed.?
> ?
>
> I don't miss that old V850 and the CRT display that took up a lot of
> space on the console.?
> ?
>
> Can you borrow a transducer to try as a test??
> ?
>
>%2