For fans of models, and builder to boot! living in a confined space, an antenna, all things that can help greatly and which does not take too much space! To prove the lower photo is an antenna for 20 meters (14MHz) on a balcony above that of Fernand Reynaud dixit: (it does not younger!) Over a frequency! composed of 2 half waves (yes Yes! one on each side!) wound on itself in a spiral! ("T lapalisse not? You?") And fed directly by seeking agreement on the spiral with a crocodile clip, the two spirals are wound in opposition, one to the right, the other left. Course of 11 meters, it is clear that the antenna is much less room than on the picture below (1 / 2 wave 20 m = 10 m and 1 / 2 wave 11 m = 5.5 m) of course we can prune No matter what frequency on! This must be 70cm too cute! was trying to fool the tester, just for fun. Dabe As for all the additional information on this antenna a bit unusual, google is your friend (who you do not want to necessarily good!)
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