John, Thanks for the note. I, like you, thought that placing capacitors at a few key points would do the trick, but apparently not. The antennas referenced in the articles have up to 40 plus capacitors spaced equally throughout the dipole length. They provide a formula to calculate how many caps and values and the length of the wire sections in between.
I can pass to you, directly, the articles I have in PDF, which will get you started. (See the next e-mail) I will try to scan the Antenna Compendium cookbook article, but it is a weird page size. 73 Rick W5RH Rick Hiller *The Radio Hotel* -- W5RH On Sat, Jul 7, 2018 at 10:22 PM, John Parmalee via BVARC <[email protected]> wrote: > Rick, I read with interest about the CCD antenna. I understand to > shorten an antenna you us series C. In this case it is apparently > intentionally made long and shortened with C. > > > > I tried a 20 meter full wave in my cad program. (MMANA)-GAL) I put a cap > every 1/8 lambda. I tried the automatic optimize and manually adjusting > C to no avail. R never came below a thousand ohms but was able to get Xl to > a null and gain at 7 or so DBI. Although all the components were > symmetrical it became directional and height did effect it. Not having any > of the ARRL Compendiums at hand can you give me a hint where the C is > applied? I think I would like to build one if I can get the model to > work. > > John Parmalee > [email protected] > 281-380-3811 > K5VGM WI2XLJ > > _______________________________________________ > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Message delivered to [email protected] > >
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