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

[Andy - KU4XR]

--- On Mon, 1/12/09, Scott Tilley <sthed475 at telus.net> wrote:


> By the Principle of 'Superposition'.

Could this elementary definition give a basic comprehension of
the principle??  " Equal amplitudes, of opposite polarity / phase
will cancel out each other " An experiment; take 2 nine volt
batteries and connect them + to -, just plug them together.
Measure the voltage on the terminals, and you'll get near Zero
depending on the voltage level of each battery. NOTE !!! DON'T
leave them connected for long, they could explode !!!

On the Noise Canceller; you have a noise on the Main Ant. and the
same noise on a Sensing / Aux. ant. by using the amplification
on the sensing ant. once you get the noise levels equal in 
amplitude, but opposite in phase, they will cancel each other out,
and " Away goes the noise !! "

This isn't a Quantum Physics description, but I hope it's on track.



Andy - KU4XR - EM75xr - Friendsville, TN.
LOWfer Beacon " XR " @ 184.322 KHz ( QRSS-60 )
Coordinates:  N:  35* 43' 54" - W:  84* 3' 16"
http://www.myspace.com/beaconxr