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Nicely done video tutorial by Bob Plank (KK4DV) on how to design, build, and use a multi-band dipole antenna. Bob's dipole covers the 40, 20, 17, and 10 meter amateur radio bands. According to Bob, this antenna is "an easy project done in 1 day." He used the customary formula for half wavelength dipoles and a simple antenna program called N2IMP from hamuniverse.com.
Although I have no issues with the antenna design or its construction, a far simpler way to get multi-band HF performance would be to use a 40 meter dipole antenna fed by open line wire such as 300 ohm television twin lead or 450 ohm ladder line coupled to a 1:1 or 4:1 balun and run into an antenna "tuner" with a short length of 50 ohm coaxial cable (RG-8,RG-8X, or even RG-58).
Either way, you'll have an antenna that will perform on several amateur radio bands using a single feed line.
Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).