[Elecraft] 20m Vertical on roof

[Bill Coleman]

On Jun 4, 2004, at 5:49 AM, Martin.Evans at simoncarves.com wrote:
>
> I'm thinking of mounting a 1/4 wave 20m vertical on the roof of the 
> house.
> However it will be only 2 feet away from next door's TV antenna and 
> one of
> the ground plane wires will run parallel to the TV downlead, am I 
> asking
> for TVI trouble even though I'm only using qrp?

Yes.

Remember that the field intensity varies as the square of the distance. 
Place the antenna 4 feet away, and you'll reduce the interference 
fourfold.

I'm just curious that your neighbor's TV antenna is only 2 feet away 
from you house.

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901