[Lowfer] Noise Canceler Effectiveness... How it REALLY works ??

[Alan Melia]

Hi Ok on the loops but this form of noise canceller works with two end fed
wire antennas too...... which dont have "fig of 8" patterns !!

On the K9AY I have reservations about that explanation too because the K9AY
is not  a loop....it is more like a travelling wave antenna. It may be the
model works, but I prefer to compare it with a coupled line. Think of a
directional coupler only here the coax/waveguide is the earth ionosphere.
Then the coupled line is a line terminated in a resistor  where a signal
from one direction is absorbed in the matching resistor. The matching
resistor need changing depending on the direction in the K9AY ....varying
the orientation of a pick-up loop in coax changes it impedance, and so
requires a different termination.  Any comment ?? There are elements of this
in a Beverage too.

Alan G3NYK