"Robert Swinney" writes:

Gee, I dunno. It seems the whole house connected to the electrical grid would form the world's
greatest long wire antenna.

It's not always the size that matters.

Antennas get better reception when they are proportional to the
wavelength. So in some cases, shortening the antenna improves
performance.

And if you think I am using an idiom, I suggest you do not try any
experiments.