Seite 1 von 3
For watching the 10m, 6m and 4m bands ES openings this magnetic loop antenna was built. A juvenile bicycle rim is used as the loop.
The Butterfly-C is made of some laser-cut aluminum of 3mm.
The antenna in C max position = 27,99 Mhz
It is quite difficult to reach mechanically exact parallel fixing of the butterfly plates to have maximum C.
Distance between the plates ~ 1mm