>
>K7GCO wrote:
>
>>I've run patterns of verticals with radials 10 or more WL long and it shows
>>some promise. I have a location where I will be able to do that. Has anyone
>>any experience with this?
>
>I don't know what program you used, but I ran
>a bunch of simulations on NEC3-GS. The results
>are fairly discouraging. With 10 WL long radials,
>you need thousands to be effective.
// Since the end-feed Z of a half-wave vertical is typically c.
1000-ohms, even one 1/4 wave counterpoise makes a sufficient ground.
OTOH, with 1/4 wave verticals, which have a thirty-something ohm feed Z,
an extensive ground is needed.
cheers
- R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.
end
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