[TowerTalk] RFI Radius vs Ant Height

[David Hachadorian]

----- Original Message ----- 
From: "Pat Barthelow" <aa6eg at hotmail.com>
To: <towertalk at contesting.com>
Sent: Thursday, August 03, 2006 12:17 AM
Subject: [TowerTalk] RFI Radius vs Ant Height


>
> Question is:
> What has others experience been while running KW level HF 
> stations, as to
> typical or maximum distances from your station 
> tower/antenna, to homes
> experiencing objectionable RFI to various home 
> electronics.  If say, 500
> feet, in my case I may irritate 60 or 70 households.

It looks like your electric and cable lines are underground 
in that neighborhood. That is good. I guess there is no 
restriction on towers. That is also good. I think you have 
hit upon the perfect city location! It's good to be in the 
center of a development, far from overhead power lines.

I run 1500 watts to a tribander at 50 feet in a neighborhood 
like that. I've been here for 29 years now, and neighbors 
have come and gone. I've had some complaints, but not many. 
Most relate to telephone interference. I just give them a 
cheap rfi-resistant phone, and that usually solves the 
problem. I don't have any problems in my own house, so I 
expect that the neighbors are ok too, but I don't go out and 
ask them. Almost all of the complaints have come from within 
a 100 yard radius.

An even more serious question these days is how much rfi are 
the neighbors going to generate? A bad plasma TV, digital 
power supply, or "smart" battery charger can wreak havoc on 
the hf bands.

Dave Hachadorian, K6LL
Yuma, AZ











































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