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Vertical Antenna

Antenna canna da pesca Rybakov


Antenna canna da pesca Rybakov

Un cavo che useremo come radiatore sara' lungo 3/4 d'onda della frequenza di lavoro piu' alta, saremo in presenza di un'impedenza di circa 200 OHM quindi si rende necessario un BALUN 4:1 in modo da adattarla ad un valore di 50 OHM 200/4

Antenna canna da pesca Rybakov

Antenna Vertical Links

Super facil antena VHF 1/4 ONDA
It's about making us an antenita type GP ground plane for the VHF band

Systeme d'antennes verticales en phase
Two vertical antennas lambda / 4 and placed at a distance equal to lambda / 2 are fed simultaneously by the same signal in emission. The signal is applied with a phase shift or 180 degrees

The 5 band pipe vertical, KL7JR
A simple, cheap and easy to build 26 feet long vertical antenna that works DX on 10 20 meters including warc bands

Un commutatore per sloper, IZ7ATH
I built this switch to switch some sloper for low bands without increasing the number of cossial cable descents