Fact or Fiction... [TowerTalk] Broken Johnny-ball insulators

[Mike Gilmer - N2MG]

A quick search on google yields this gem

http://isddc.dot.gov/OLPFiles/USCG/010480.pdf

<< 
These insulators have a small unglazed surface 
which, although watertight, is liable to collect 
contaminants and is therefore installed facing 
down the guy so that the insulator will stay 
clean. When ordering, two coats of varnish or 
weather resistant enamel should be specified to 
cover the unglazed portions.
>>

I have not been able to find an explanation as to why 
there's an unglazed surface in the first place. It 
could simply be because the manufacturers need a 
place to hold them during glazing (Achille's Heel 
syndrome) and not placed on purpose as a way for 
moisture to drain.  To wit, the Coast Guard document 
recommends painting over the bare patch.

Nice to know there's an up and down to these beasts - 
AFTER I put several dozen of them up already!

Mike N2MG

________________________________________________
PeoplePC:  It's for people. And it's just smart. 
http://www.peoplepc.com