Re: Topband: Radials, EZNEC and far field

[Artek Manuals <Manuals@ArtekManuals.com>]

Soil conductivity plays a much bigger role than most of us realize and 
the "over salt water" is the gold standard`. As noted by a few other 
respondents radials are certainly helpful but for those of who live on 
quartz plains (sand) far from the ocean the far field losses can not be 
totally overcome by copper plating your yard in a 130ft circle


Dave
NR1DX



On 12/19/2022 5:50 PM, Ignacy Misztal wrote:
> Do more radials on a 160m vertical bring more improvements than shown
> by simulation?
>
> Most simulations, e.g. by EZNEC, show that going above 32 radials on 160m
> brings minimal improvement, say 1 db to 2 max. Even for low angle signals.
>
> On the other hand, some really loud stations on 160m, that are 5-10 db 
> above
> the crowd, use a massive amount of radials. This is for inland stations,
> far away from salt water.
>
> Is there any discrepancy between modeling by EZNEC and real life
> performance with the number of radials? Does adding radials beyond 32 help
> much for low angles?
>
> Any real story?
>
> I have a shunt-fed 100 ft tower with 36 100ft radials. It is vastly
> inferior to a 40 ft high inv L with 1 radial by salt water that hears DX
> loud 2 hrs before the sunset. I am wondering whether by expanding to 50
> 200ft radials would narrow the difference.
>
> Ignacy NO9E
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Dave Manuals@ArtekManuals.com www.ArtekManuals.com

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