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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!)
USB dongle is on sale for the modest sum of 154 € from 21 th century receiver that covers from 64 MHz to 1700 MHz "Wow" with just the little program that goes well, and an antenna and yay! you can make plays around with your cellphone! the laptop! no phone! we must not dream, but soon with new smartphone who make the coffee that you can connect a USB dongle thumbnail to pursue his passion! and you can listen on your scans your boss who gets drunk on the phone! Anyway thanks to the passage, while the most fortunate among us who buys all the latest price of gold, which allows us to others less fortunate fans to have for a small fee! , But late! We can not have everything! Anyway!
A bit of humor! Who said, "it is not those who have the biggest ears that hear the better!" To believe our most eccentric inventors it is those with the biggest ears that hear the better! proof image below! the invention date from the 2nd World War to try to come hear the enemy bombers! before the invention of radar! fashion is recycling, then recycle old ideas! You're in no position to do radio? You listen? Then, take the giant sonotone! more antenna problem! Tell your neighbors that you are deaf! and you long hours of listening in peace!