> Have Topbanders used parasitic elements?
>
Yup!!
> Although a radiator with an electrical length of 0.25 wavelength worked
> against a non-resonant ground system is common and successful, I believe
> (I hope correctly) that in order to be to be effective parasitic elements
> need to be close to 0.50 wavelength (+ or - thereof, depending on whether
> reflecting or directing),at least electrically if not possible physically.
>
> A practical solution suggests a parasitic element in an inverted vee
> configuration in order to handle the considerable length (reducible with
> lump loading) required to approach ~0.50 wavelength.
>
> Commentary welcome!
>
Hmm - some of that sounds like the Spitfire array which uses half wave
elements - bent into a triangle shape.
http://www.yccc.org/Articles/Spitfire/spitfire.htm
I have had good results with quarter wave elements against a non-resonant
ground system (fairly good ground with about 42 radials). You can use
either a director or a reflector.
Tree N6TR
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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