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Let's see what Eznec5 says regarding 'Doc's claim that there is less that a $.05 difference as described. It might be true if you believe that construction has little to nothing to do with performance of a vertical antenna.

 

I used a model I had of a .25 wave radiator at 12' feet high, with 4 horizontal 108" radials. I then slanted the radials down at less than 40* degrees and made the model resonant. I then removed 3 of the 4 radials and made the model look similar to what 15minigrass shows which is the bases of what 'Doc tells us.

 

I can't make a claim here either way, but this is what Eznec5 shows me.

 

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