David G. Nagel wrote:

SNIPPED

What I was taught is that in a properly installed antenna system the
coax will not radiate. If the antenna is not properly matched to the
coax you get current flow along the outside of the coax shield.

Dave WD9BDZ

A balanced antenna fed with balanced line, and the line goes away from
the antenna perpendicular [90 degrees angle] for a minimum of 1/4
wavelength is a properly installed antenna system: [line has minimum or
no radiation]

A balanced antenna fed with balanced line, and the line goes away from
the antenna non-perpendicular [other than 90 degrees angle] for a
minimum of 1/4 wavelength is an improperly installed antenna system:
[line will radiate]

A balanced antenna fed with un-balanced line, and the line goes away
from the antenna perpendicular [90 degrees angle] for a minimum of 1/4
wavelength is an improperly installed antenna system: [line will radiate]

A balanced antenna fed with un-balanced line, and the line goes away
from the antenna non-perpendicular [other than 90 degrees angle] for a
minimum of 1/4 wavelength is an improperly installed antenna system:
[line will radiate]

A balanced antenna fed with un-balanced line and a properly installed
balun, and the line goes away from the antenna perpendicular [90 degrees
angle] for a minimum of 1/4 wavelength is a properly installed antenna
system: [line has minimum or no radiation].

An un-balanced antenna fed with balanced line is an improperly installed
antenna and the line will radiate.

NEED I CONTINUE??