自製伸縮偶極天線 DIY telescopic dipole antenna

[@75ohmHAM]

This is a 1/4 wave, not a dipole you need a BalUn for push pull on both legs, RF is only on one leg.

[@yuhsiang1031]

I used ferrite beads as the balun. This video showed those beads could be effective. th-cam.com/video/9JIwv8T27NA/w-d-xo.html

[@kerrywang5265]

超酷