>There is no problem with correctly assembled N connectors at these power
levels; but there is a risk of failure if the centre pin is not mated
correctly.
This can happen when N connectors with a floating centre pin are used
with semi-airspaced cables whose centre conductor is free to move
inside the cable. A hanging length of cable, and/or some flexing in a
rotator loop, can sometimes pull the centre pin partly out from its
socket, causing high resistance (especially at UHF where skin depths are
smaller) and failures at high power.
The solution is always to use connectors that have a captive centre pin,
and to take care when installing cables that have a floating centre
conductor.<
--
73 from Ian GM3SEK
::I agree with this entirely. However, another good way to assure the
center pin doesn't retract from its mate is to use a 360 degree drip loop in
the cable. That way, "gravity" is greatly reduced to only the weight of
half the loop, and not a long run of cable going down a tower leg. Doing
this, I've never seen a pin retract. -WB2WIK/6
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