| OK, I'll bite... Why would you put up a 5/8 wave vertical?  Have you modeled 
this dog?
Now, I suspect you are talking about an inverted L - as the 5/8 vertical is 340 
feet...  This is an even bigger dog - unless you want the biggest signal for 
local rag chewing, where it is a killer antenna... It also will bask the 
nightcrawlers in welcome warmth all winter long..
OK, to answer the question, yes you would want the radials long enough to mask 
the radiated EMF from the ground directly underneath...
cheers
denny / k8do
      
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160 meters is a serious band, it should be treated with respect. - TF4M
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