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[RFI] Power Lines

To: "RFI Reflector" <RFI@Contesting.com>
Subject: [RFI] Power Lines
From: "Jim Miller" <JimMiller@STL-OnLine.Net>
Date: Sun, 23 Dec 2007 12:59:32 -0600
List-post: <mailto:rfi@contesting.com>
Thanks Guys,

Two large poles together with a single cross piece with all three 
"wires"(cables) hanging from the dangling insulators.  Sounds like AC then.  
The power company maintains a cleared right-of-way width of 130 ft.  The pole 
sets probably average about 5-600 ft separation.  Often wondered what the 
voltage was.

Tnx es 73, de Jim, KG0KP

----- Original Message ----- 
From: W0UN -- John Brosnahan 
To: Jim Miller 
Sent: Sunday, December 23, 2007 8:22 AM
Subject: Re: [RFI] Power Lines

At 08:02 23-12-07, you wrote:

  Does the RFI from DC lines tend to be less or more than that from AC lines?
  Is there a way to tell if the lines are DC or AC?  Can you "listen" to them
  or something?  I have HV lines running across my property in the country.

  Tnx es 73, de Jim, KG0KP


Looks to me like the DC lines only have TWO main conductors (and maybe a 
third, smaller wire that is ground for lightning) while much of the AC has THREE
conductors for the 3-phase that is usually transmitted (and maybe a fourth
wire that is ground for lightning).

I am no expert by any means but I'll be that if there are THREE big insulators
on each tower it is AC and if there are just TWO it is PROBABLY DC.

At least that would be my best guess.

John  W0UN

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