You cannot just join it electrically, the impedance must be maintained. You
could fit connectors and then seal it all with self-amalgamating tape.
Unless it is a very long run the best solution is to replace the cable. If
it is more than five years old it is probable that it will have deteriorated
enough to reduce the signal significantly.

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"Chris" ] wrote in message
]...
Joining co-axial cable outdoors - what's the best way to do it?
I've got an aerial cable running along the outside of the house wall
and I want to splice in an extra length.
Would soldering be best?
And how would it be done neatly?
--
Chris