I explain the basics of the End Fed Half Wave (EFHW) Antenna, and how i calculate the lengths of my antenna for my targeted bands. I also go over some harmonics and how this can be used to combine a couple of bands on a single antenna.
Links:
Centuriioneye 160 PCS Spade Connector – https://amzn.to/3lAMNB9
BNTECHGO 20 Gauge Silicone Wire – https://amzn.to/419yWSE
ARRL Band Plan – http://www.arrl.org/band-plan
Antenna Formula – https://www.electronics-notes.com/articles/antennas-propagation/dipole-antenna/length-calculations-equation-formula.php
Math Notes:
Target bands
10M = 29
15M = 21.325
17M = 18.139
20M = 14.25
40M = 7.2125
cut
Magic Number (468) feets
17M = 25.8, 25′ 9.6"
20M = 32.84, 32′ 10.08"
40M = 64.88, 64′ 10.56"
Elements going to cut:
17M = 25.8, 25′ 9.6"
20m = 7.04, 7′ .48"
40M = 32.04 32′ .48"
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