Due to its easy and simple construction, dimensional tolerance & hence reproduciblity in DIY enviroment, good performance, and popularity, I have placed the Spider as first one in the list, and titled it “Easy Antenna #1” in the following threads started by me in March 2015:
Flightaware Forum - Three Easy DIY Antennas for Beginners
Flightradar24 Forum - 3 EASY ANTENNAS FOR BEGINNERS
Planefinder Forum - THREE EASY ANTENNAS FOR BEGINNERS
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