[Elecraft] 20m Vertical on roof

[John J. McDonough]

----- Original Message ----- 
From: "Bill Coleman" <aa4lr at arrl.net>
Subject: Re: [Elecraft] 20m Vertical on roof


> 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.

Also, don't forget that vertical separation is worth a whole bunch more than
horizontal separation, so a few extra feet in height could make quite a huge
difference in the TVI potential.

That said, as best I can tell, most of the HF TVI is a result of RF getting
into the plastic box, rather than down the antenna.

72/73 de WB8RCR    http://www.qsl.net/wb8rcr
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