John, K4IQ wrote:
The question is: what further improvement is realized by using more than
two 1/4 wave radials when the "ground" 66 ft below is the ocean?
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____|____ _ 1/4L Vert. w /two res. radials at 66 feet
_______________ _ H2O + NaCl
So, what about it, gentlemen? Would 120 radials over salt water play any
better?
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For what it's worth, here's the EZNEC results:
1/4-wave 160m vertical mounted at the ocean surface with beaucoup radials
(zero ground loss): Gain = 4.67 dBi @ 7.3 degrees TOA
Raising the vertical to 66' above the salt water with two radials:
Gain = 5.70 dBi @ 5.3 degrees TOA (off the end of the radials)
5.76 dBi @ 5.9 degrees TOA (perpendicular to the
radials)
66' above salt water, 4 radials: Gain = 5.84 dBi @ 5.6 deg
8 radials: Gain = 5.89 dBi @ 5.6 deg
16 radials: Gain = 5.91 dBi @ 5.6 deg
32 radials: Gain = 5.93 dBi @ 5.5 deg
64 radials: Gain = 5.96 dBi @ 5.5 deg
All wires in the models were #12 gauge. Radials were kept at 140' long.
73, de Earl, K6SE
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