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Larry

377 wrote in news:ae1cadb1-ac04-4911-a800-
:

Is there something that can be done to prevent the moisture damage?
Holes? Dessicant? Spray?

I never found anything. You can't pressure seal it because the plastic top
just couldn't take the pressure differential and it only has 4 screws
holding the whole flimsy top on. The seal is not a pressure seal, anyways,
and would simply blow out or in opening a hole.

The hole is already in the bottom. It has a rubber drain tit so sea spray
can't just spray up into the hole that's about 3/8" the rubber tit fits
through.

There's way too much condensate formed for any dessicant. The dome
breathes out when it's in the sun in the day, then sucks in that wonderful
100% afternoon humidity present in any seaside marina as the dome cools
after the sun goes down. The thin dome gets colder than the guts inside,
so the water in the freshly breathed in air condensates in the now-colder
saturated internal air, condensing, finally, on the cheap pot metal
chassis/shield that SHOULD have been made of something non-corrosive for
the $2000 they want for it. The box the electronics is in SHOULD have been
sealed with waterproof connectors to hook the control/power cable to, but
it's wide open to this swamp with these cheap little PC board wire clips to
save Raymarine's profits so the whole swamp gets INSIDE where the decaying
pot metal drips onto the internal PC boards, destroying them. The nightly
internal rainstorm rots the magnetron's soft iron core destroying it.

The antenna, nothing but a piece of printed circuit board with stripline
elements etched into it isn't sealed against this rot, either, or is its
wide-open rotating connector the little cassette tape player motor turns
with a rubber belt.

Someone needs their ass kicked besides anyone who DARES talk about it.....

Look in one for yourself.......before you buy it, preferably.