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I really enjoyed this video from Denis (VK3BF). I've built a few variations of this portable antenna for several amateur/ham radio bands from 80 meters through 10 meters. All have worked very well considering the limitations of compromise antennas.
In this video, Denis shows us how to make an easy, inexpensive portable antenna for 40 meters and other bands. Denis says the materials for this project are readily available. Components include a Shakespeare telescoping carbon fiber fishing pole from Amazon, a LDG 4:1 balun, 33 feet-9 inches/10.289 meters of 18 gauge speaker wire, and various miscellaneous pieces. Although an antenna transmatch (i.e. "tuner") isn't required, it may help solve any minor SWR issues found with this antenna.
I have several of these fishing pole antennas at my ham shack for portable and emergency use...a great antenna for Field Day or for camping in the great outdoors.
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Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).