On Sat, 07 May 2005 19:42:06 -0400, Larry W4CSC
wrote:
Red Cloudİ wrote in
:
The instructions for my $80 fishfinder, which I use as a backup for my
"real" depth sounder, says emphatically not to use a glob of silicone
glue to mount the transducer inside the hull.
Any soft glue, like your bathtub caulk, will ABSORB the ping from the
transducer. So, we use epoxy, which is very hard and very conductive to
the ping into the hull for maximum transmission of the sound.
I've successfully used Lifecaulk, or similar soft caulking compound,
although some manufacturers recommend epoxy. Epoxy seems to be too
permanent for my liking.
Using a soft sealant may reduce the usable range somewhat, but I am
more interested in how shallow it is, not how deep...
A suggestion _before_ you glue down the transducer: put the transducer
in a plastic bag with some water, and hold it against the hull in
various locations to find the location that gives the best
performance.
--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
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