Telamon wrote:

A local noise is another matter greatly affecting many peoples
reception of short wave signals since many electronic devices around
the home and neighbor¹s homes generate noise. Here the type of antenna,
how it is connected to the receiver, and where it is located on the
user¹s property makes a huge difference on what may be heard.

Fundamentally, you want the entire antenna system to reject common mode
noise since to a local antenna this is the mode in which, the local
noise will couple to the antenna.

Yes!

You will want to use an antenna that
is balanced (Hertzian) instead of unbalanced (Marconi).

With an unbalanced antenna you must take more care to keep common mode
out of the feed system. It is not terribly hard, however, to reduce
common mode coupling to negligible levels, even with an unbalanced
antenna (see
http://www.anarc.org/naswa/badx/ante...e_antenna.html). One
may want an unbalanced system for other reasons. A balanced dipole close
to the ground generally has a poor vertical radiation pattern, while an
inverted-L is much better.

You might also
want to consider using an antenna type that responds more to the
magnetic field component of the radio wave instead of the electric.
These two suggestions encompass the fact that most of the local noise
energy reaching and coupling to the antenna is a common mode electric
field and since the far field broadcast signals you want to receive is
composed of both electric and magnetic the later will be enhanced at
the expense of the former.

This claim is widely made in the hobbyist literature, but I've never
seen any measurements to back it up. I've tried to check it myself, and
found the opposite: close to modern sources of EMI, the field tends to
be predominantly magnetic. You have to be very close the source to see
any effect at all: beyond ~0.1 wavelength induction balances the field
pretty effectively.

The connection from radio to antenna is best shielded so you would use
coax. You could use a balance line but they are harder to acquire, use,
and still will not work as well as coax shielding against local noise.

The antenna would be located as far from the majority of local noise
sources as possible on the property. Distance reduces the coupling to
local noise sources.

Yes!

-jpd