> 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 _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
