This is the reason why most reputable two way dealers don't buy the crappy n
connectors and spend the few extra dollars and buy the captivated pin type n
connectors. You learn your lesson the first time you have to go up 200' in
the middle of January to fix a bad jumper that had junk connectors on it in
the first place.
Use pl-259 connectors up to 30 mhz even for splices without any problems,but
use good captivated n connectors on anything over 30 mhz. If you know how to
properly install them, they will last forever.
I have tdr'd cables with splices in them many times, and yes you see a small
bump, but it's not enuf to cause a problem, especially for ham stuff on hf.
73,
Scott
KA1CLX
>_________________________________________________________________________
>I respectfully disagree to this extent:
>
> I, and others before me, have had trouble with N connectors in that the
>center conductor of the N connector is soldered to (and therefore
>physically connected to) the center conductor of the coax. Unfortunately,
>the cold can sometimes cause the center conductor to contract more than
>the outer conductor (coax) and causes the pin to retract and sometimes
>pull away from the female connector's center conductor. It's rather
>obvious the results: no continuity. I've had this happen to me. It is
>better, when using N type connectors, to solder the center conductor a
>little further out than is usual in order to keep this from happening.
>
>I might add that the longer the coax run, the greater the possibility of
>that happening. A short run might not have sufficient temperature
>coefficient of contraction to cause this. (I may not have used the
>exactly correct terms to describe this phenomena but I hope you are able
>to follow the gist).
>
>On the other hand, UHF style connectors normally do not have this problem.
>It is my opinion that at HF frequencies, UHF connectors don't cause enough
>discontinuity of impedance to a feedline such that you could ever measure
>the effect, even with a sensitive, expanded-scale wattmeter.
>__________________________________________________________________________
>>"...they are the worst connector I can think of, except maybe RCA's.
>__________________________________________________________________________
>That statement requires some justification or explanation. "They are the
>worst connector I can think of"... for what? HF frequencies? Don't
>think so. Worst in what way? SWR? Leakage? Moisture? What?
>
>Anyhooooo, that's my two cents worth: light up your flame throwers.
>
>Rod, H5HV
>w5hvv@aeneas.net
>
>
>
>
>
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>
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