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Old May 16th 06, 03:39 AM posted to rec.radio.amateur.antenna
 
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Default FIGHT? Here is another W8JI myth bone!

Nice try Yuri, but you can see no one is buying into your theories.

A shield works the way a shield works. The time-varying fields, once
the frequency is high enough so the shield is several skin depths
thick, really isolates everything from passing through the shield.

The primary coupling is via the voltage across the gap and the current
flowing around that edge.

The shield is the actual antenna. Not the conductor inside the shield.

Noise is NOT any particular field impedance. There is nothing that says
noise is electric field dominant at the radiator, and if it was just a
few feet away (about 1/10th wave) it would change anyway.

If you disagree with how a shield works or if you think electrical
noise is a high field impedance or electric field dominant, then you
should say why or how that is true.

73 Tom