Re: [RFI] Power Line Noise

["Eddie Edwards" <eddieedwards@centurylink.net>]

Scott,

I think this calculator will be a bit more accurate than your 1/6th 
calculation.  
https://www.everythingrf.com/rf-calculators/antenna-near-field-distance-calculator
  

Also don't forget to use the full size (either dimeter or length) of the entire 
yagi array as Jim Brown pointed out.  When I do this for typical 20 meter yagi, 
please correct me if I'm wrong, but I get a far field distance of 9.5 meters or 
about 31 ft for a typical 20 meter yagi.  It still might be this far away if 
across the street.  

73, de ed -K0iL

-----Original Message-----
From: RFI On Behalf Of K9MA

I believe near field for antennas is generally considered to be about
1/6 of a wavelength. That's only 11 feet on 20 meters.

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