[Lowfer] antenna current

[Peter Barick]

>>> w1tag@charter.net 10/17/03 10:23AM >>>

>The concept of 120 wire,  0.25 - 0.5 wavelength long, was based
> on three goals:
>1. To return as much ground current in a low resistance path 
>2. Using radials longer than 0.25 wavelength, to provide a highly
> conductive reflection point ...
>3. To reduce dielectric losses in the immediate vicinity of the
antenna.

> one can be reasonably achieved in back yards at LF,
>that is to reduce the dielectric losses close to the antenna.

>So the usual idea is to concentrate on forming a ground SCREEN.
> Things like chicken wire are very effective at this

>John Andrews
-------------------------------------------------------
Ok, John, fair enuf for LF. Sevick's test freq was 80M, I believe.

So if it's a screen near the base, how big in radius?

Does the same apply to a mere receiving vertical or is the need for a
current return path less critical?

And what about a screen for a small rx loop mounted near ground. Think
it was advised here, though maybe for noise reduction (?).

Peter