It is really very cheap antenna, and every body can build it. The whip is larsen antenna and the lower part is PVC 1-1/4" as core and body it self. I make three parts of winding. First, 44 turns close winding is in the upper part of PVC, and the center part is 4 turns with wide space winding then the lowest is for matching impedance has 8 turns with one wire spaced winding. The PVC length is 40 cm and I use heat shrink rubber to keep rigid and avoid of rain water. This antenna is quite good both for reception and transmission, but unfortunately, the bandwidth is only 20 khz and the lowest swr is 1.2: 1.I put this antenna at rear corner of the car. Up to now the longest distance is Pakistan, with FT 180A .
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