On Sat, Sep 06, 2003 at 02:19:08AM -0700, Steven J. Gehring wrote:
> Yep...center pin migration due to extreme temps happens with these
> connectors. But, the biggest issue I've seen with mil-spec type N's are
> their incorrect installation (both in the government and civilian worlds).
> If the center pin extends beyond (outside) the inner shield ring of the male
> connector, you're asking for trouble. The problem is that the inner lip of
> the male pin butts up against the female tines prematurely, or before the
> mating connectors are fully screwed together. This has busted the female
> tines in the female connector, or caused them to lose their spring tension,
> through the actions of people who didn't know of this issue. Obviously,
> these people didn't inspect the connectors prior to mating them. IMHO, the
> tip of the male pin should reside flush to about 1 mm below the inner shield
> ring.
>
> The reverse is also true with these connectors. The male pin can be recessed
> too far down inside the male plug. If this happens, there won't be
> sufficient mechanical and electrical contact, and this could lead to serious
> problems (see the mail below for an example).
>
> I know there are newer and better designed N types out there, but I've
> haven't used them yet. I'm hoping they address pin migration to some
> degree. Can anyone recommend Manufacturers and p/n's of their decently
> updated type N connectors? Please pass along your detailed experiences and
> successes with the newer varieties. I know I'd really like to ditch having
> to meticulously make the mil-spec variety.
>
I've probably attached a few hundred N connectors and about 40 years
ago learned an easy way to inspect the installation. Push hard on the
end of the connector with the tip of a finger. The ring and tip should
both make the same degree of indentation into the finger. If the
indentations are not equal, take it apart and start over.
Bob, N7XY
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See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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