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Here's a strange, very shortened antenna that works well on the 30 meter amateur radio band (10.000 mHz to 10.150 mHz). According to the author of this post, The 9-inch/22.86 cm vertical "halo" radiation section is made from AWG #10 wire and the loading coil uses 2-inches/5.08 cm of PVC pipe wrapped with AWG #26 to #14 wire. The antenna displays a SWR below 2.0 for all frequencies in the 30 meter amateur radio band. Apparently, this experimental antenna works, although I suspect efficiency will be very low.
For the latest Amateur Radio news and information, please visit these websites:
http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon).
https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information).
Other sites of interest:
Hawaii Science Digest (https://paper.li/f-1476233615).
Hawaii Intelligence Digest (https://hawaiiintelligencedigest.com).
Hawaii Intelligence Daily (https://paper.li/f-1482109921).
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Opinions expressed in this blog are mine unless otherwise stated.
Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).