John, this business about problems caused by radiation from feedlines
is very much exaggerated. It occurs far less frequently than it is
mentioned on this newsgroups. It's just something to waffle about.

It's perfectly obvious far more near-field interference occurs due to
radiation from the ANTENNA. Especially when the beam is pointing
towards the house.

The antenna is designed and intended to radiate. Whereas the feedline
only does it because of occasional imperfections and by accident.
Most of the time it is not detectable as interference from either
antenna or the line.

{Actually, it is nonsense to discuss things in terms of separate
radiation from line and antenna. I am obliged to do so here to make
myself understood and avoid accusations of trolling.}
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Reg