[TowerTalk] COUNTERPOISE for Dipoles

[Tom Rauch]

> (this is a resend - sorry if doubles appear, but I think my ISP ate the
> first try)


Must have. I replied direct.


> - Were the wires right below in a bundle or spread out by some amount?

Spread out parallel to the dipole.
 
> - How many wires?

He had several.
 
> - Above the surface, below, or on the surface?

On the surface. I bury mine because it is more mower friendly and I 
have a tractor with a radial plow. 
 
> - 1/4 wave, 1/2 wave, dipoles, ?

1/2 wl dipoles
 
> - does this change the pattern or move the gain to a different angle?

Reduces coupled losses to earth, by shielding the antenna from 
earth, which helps efficiency at all angles. It also increases the re-
enforcement gain. 

This is an old trick used by the QRMers on 75 meters, worth more 
than doubling or tripling the power. It also has more friendly uses.


73, Tom W8JI
w8ji@contesting.com

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