Many years back I once had a 10m dipole about 8 feet from the house at
cast-iron roof-gutter level. The Tx was in an upstairs bedroom. The
short coaxial line to the dipole went through a hole in the bedroom
wooden window frame.

Sunspots were at their best. On completion of the installation, much
to my surprise, I worked my very first Australian (in the antipodes
from Birmingham) and completed the log entry in exceptionally neat
handwriting.

I then went downstairs and reported my conversation with Bill in
Adelaide to my XYL. All she had to say was a brief "Your dinner's gone
cold.". So much for her deflating enthusiasm!

But the most extrordinary thing about the episode was the fact that
the bedroom 60-watt light bulb (admittedly a temporary arrangement)
came on more strongly when the key was UP and went more dim when the
key was DOWN.

I was running 100 watts from a Kenwood TS-520. The bedroom light was
not being run from the 240-volt power wiring to the TS-520. After
years of thinking about it, I have never found an entirely
satisfactory explanation.
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Reg, G4FGQ