A knot in an antenna wire will have absolutely no electrical effect
below about 200 MHz.

But it will mechanically weaken the wire. During the next hurricane
or
loading with ice it will be more likely to break.
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Reg, G4FGQ


Buck says politely -

Your answer is surely correct, but not as interesting as the other
threads.

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Buck, may I suggest replacing "interesting" with "useless".
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Reg, G4FGQ