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Here's a 30 meter vertical antenna that is only 9 inches/22.86 cm tall, including the "halo" which serves as a "top hat." According "visualjuiceman", the antenna works quite well on the 30 meter Amateur Radio band and exhibits a low SWR (see photo of the MFJ HF/VHF SWR Analyzer, model MFJ-259B). The coil consists of a 2 inch/5.08 cm PVC form using 26-24 AWG wire. The radiator is made from #10 AWG wire. This antenna is very "stealthy" and could be used in deed-restricted properties. Why not make one of these super small antennas and have some fun?
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Aloha es 73 de Russ (KH6JRM)