[Antennas] Diminishing Returns

[David C. Hallam]

I understand all of that BUT.  I can not separate my radials to any 
great degree.  They would have to run in two pie shaped groups 
approximately 180 degrees apart and regardless of the number of radials 
in the group, the maximum spread at the far end of the entire group 
would be only about 20 ft.  I could put 96 radials (48 in each group) 
and the wires would be only 20 ft/48 wires or about 5 inches apart at 
the furthest distance from the antenna.

David
KC2JD/4

Jim Miller KG0KP wrote:
> As previously stated See Cebik's site www.cebik.com .
> 
> All the charts are there.  These are not hearsay, they are science.
> 
> As an example, going from 32 to 64 radials will gain you .15 dB !!!!  Adding 
> 64 to that (128) will gain you about another .15 dB.  You gained .3dB by 
> adding 96 radials !!!!  It's your dollar.
> 
> With 32 radials - going from 2mm diameter wire to 8mm dia will gain you 
> about .07 dB.  Slightly less than if you have 64 or again to 96 !!!  Not me. 
> It's YOUR antenna and YOUR money, do what makes YOU happy.  I would spend my 
> money on more economical improvements that would gain me a lot more more per 
> dollar than that many radials.  IMHO of course.
> 
> Not argueing, just stating the facts, Jack.
> ...........................................................................................
> 
> Cebik: Here are the tests that you will encounter in this note.
> 
> 1. Radial wire size: 2, 4, and 8 mm diameter / number of radials.
> 
> 2. Radial length: 0.15 through 0.40 wavelength in 0.05-wavelength increments
> 
> 3. Radial insulation: separate insulation thickness and insulation 
> permittivity tests
> 
> 4. Monopole length: 0.20 through 0.60 wavelength in 0.1-wavelength 
> increments
> 
> 5. Soil conditions: Very poor, average, and very good soil
> 
> 6. Frequency: 0.5, 1.0, 2.0, and 4.0 MHz
> 
> 73, Jim
> 
> 
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