The placement of a coil on an element affects the third harmonic. If you can work out exactly where to put this coil, we can then force a harmonic on almost any band you like. In this example we have made a compact 40m antenna of only 6.5m long and then made 20m to work on the third harmonic with very little loss. See what you think. Callum.
[ Ссылка ] - Last Video Discussing this Concept
[ Ссылка ] - End Effect Discussion
[ Ссылка ] - The Custom Hybrid SkyLab
[ Ссылка ] - Live Stream where I Switched Between
