At 11:59 AM 7/18/2010 +0300, you wrote:
>speaking of hydrophones,
>
>I want to make extension cables for my hydrophones, so I can dip them
>further down,
>
>the obvious solution would be to completely coat the joints with some
>waterproof substance, maybe slicon or rubber,
>
>but I' m wondering is there is any other way to ensure a waterproof
>connection while remaining flexible on the same time.. Maybe there is some=
>kind of waterproof XLR plug out there ? or maybe some kind of vaccum case=
>that could be handy ?
>
>anybody tried sth similar ??
When I was working in oceanography, a common method of waterproofing a
connection as you describe was to wrap it using a 3M product called
"ScotchFil" and then overwrap it with Scotch 33 electrical tape to protect=
the ScotchFill which is a very soft self vulcanizing rubber type
material. Scotchfil is actually a putty in tape form, it comes in a 5 foot=
long roll, 1 1/2" wide, about 1/8" thick... It is made and sold as a high=
voltage insulation material...
The neat thing about Scotchfil, its easy to remove when you want to
separate the joint again, slit it with a knife and peel it off like
removing the skin from a banana...
I did high pressure testing in water to determine the reliability of a
Scotchfil sealed joint at 15,000 lbs/sq in. for a project that required
going to maximum ocean depth and found the Scotchfil method was 100%
reliable. For these depths we used Alpha FIT300 heat shrink tube over the
joint for mechanical strength...
Its an incredibly simple way to make a foolproof underwater connection...
--
Thanks,
Mitch & Shadow...
http://www.4shared.com/dir/UTASxktL/wildlife.html
Shadow's area: http://www.4shared.com/dir/ecfWjyZb/Shadow.html
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