[TowerTalk] N connectors pulling off

[Gary Schafer]

Possibly you are not getting the braid conductors all flat when 
installing. You must not have any of the strands overlap others. If you 
do that raises that part of the connector fit and the rest will not fit 
tight.

73

Gary  K4FMX

Bill VanAlstyne, W5WVO wrote:
> The thread on PL-259s has been very instructive, and appreciated. But I'm
> having problems with genuine Amphenol N connectors (clamp/solder type)
> installed on Belden 9913F7 coax. And yes, I did buy the type of N connector
> specified for this cable type (82-202-1006, as opposed to the 82-202
> characterized for RG-8).
> 
> Problem is, the connectors seem to pull off very easily, especially after
> they have been installed for a year or so. My preliminary hypothesis is that
> the dielectric, braid shield, and jacket gradually "shrink back" from the
> center conductor, which (since the center conductor, when mated with a
> receptacle, can't go forward) tends to pull the braid out of the grasp of
> the threaded-on clamp that is supposed to secure it. And so the connector
> pulls off easily. I believe that this is what's happening because, when I
> reassemble the connector to the cable end without recutting anything, the
> center conductor pin protrudes further forward than it is supposed to -- 
> further than it did when originally installed. Then, when I screw the
> connector onto its mating receptacle, the center pin and cable body are
> forced backward, pulling the braid out of the connector clamp. At least,
> this is what I THINK is happening.
> 
> I'm wondering if anyone else has experienced this problem with N connectors,
> and if so, is it just with this type of coax/connector I'm using, or is this
> phenomenon common to all N connectors and coax of this size. And, of course,
> is there a "fix" that will prevent this from happening? Is there a better
> way to install clamp/solder N connectors than the method specified by
> Amphenol? Are the crimp-on N connectors better? If so, how much does the
> crimping tool cost?
> 
> Bill / W5WVO
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