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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #11  
Old 06-14-2007
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Quote:
Originally Posted by btrayfors
WHAT through-deck plug/socket??? There should not be such an animal in your VHF line. The coax should pass through the deck whole, using a waterproof fitting.

I'd suspect any such "splice".

Bill
Other than the fact it may not be common: Why? There's no reason a proper bulkhead connector couldn't be in the line. I'd tend to avoid it, because each connector in a VHF transmission line induces loss, and I'm a perfectionist about such things.

Jim
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  #12  
Old 06-14-2007
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Quote:
Originally Posted by brak
Check that the coax jacket does not come into contact with any metal, especially anything connected to the boat ground system.
Other than the fact this would be indicative of a breached jacket (generally not considered a Good Thing): Why? The shield is already at or near ground potential, anyway. (Tho, admittedly, you don't really want random grounds .)

Nit-pick: By "jacket," I believe you meant "shield." The jacket on most all common flexible coaxial cable is non-conductive.

Quote:
Originally Posted by brak
You can verify that by testing the resistance between the coax jacket and something that is definitely grounded (engine, mast, whatever). If you get anything less than infinity - that may be not too great.
With the coax disconnected at both ends. Otherwise there'll be a gound connection through the chassis at the radio end, and possibly one through the antenna at its end. (I honestly don't know if marine VHF antennas are normally grounded on "one side," as are [most] land- and mobile-use VHF antennas. New area for me.)
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