Thread: Where to find the 120 radial study ?
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Old May 29th 07, 02:31 AM posted to rec.radio.amateur.antenna
funkbastler[_2_] funkbastler[_2_] is offline
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First recorded activity by RadioBanter: May 2007
Posts: 5
Default Where to find the 120 radial study ?
On Fri, 25 May 2007 17:10:20 -0500, (Richard
Harrison) wrote:

4nec2 wrote:
"When someone asks me what`s the optimal radial ground screen, I mostly
answer: 120 radials with a length of 0,4 lambda."

That`s sufficient, but RCA`s Brown, Lewis, and Epstein did extensive
research in the mid-1930`s resulting in an FCC requirement of 120
radials with a length of 0.25 wavelengrh, equally spaced around the base
of a tower.. It wasn`t exactly what B, L, & E had recommended but it
became the minimum for broadcasters.

snip


http://www.fcc.gov/mb/audio/amgnd.html

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