[Lowfer] Dielectric loaded dipoles

Bill Ashlock [email protected]
Wed, 05 Jun 2002 12:27:57 -0400


From Lyle's post:
>I would expect very little length reduction if you ran a 1750m dipole >down 
>the center of a 1 inch (or even 12 inch) PVC pipe full of water.
And:
>The surrounding dielectric has the same effect as connecting a >capacitor 
>between the ends of the dipole. It reduces the length >required for 
>resonance, but the "return" current in the capacitor is >in the opposite 
>direction from the current flowing in the dipole, and >it cancels most of 
>the radiation. So the net effect is a very >inefficient antenna.

Come-on guys...... there just ain't no magic at LF (and that's why most of 
us love this band). Nothing works better than just plain old paying 
attention to the theory that's been around for 100 years; identifying, 
testing, and resolving all the discreapancies, and, of course,......... 
waiting for those ego-building signal reports <G>.

Bill A

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