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Antenna problems

The advantages of a vertical are that they take up little space and that the beam angle is very low
post 22 Sep 2020

Coils Traps Antennas Links →


Trapped Dipole Radio Antennas
A trap is a coil and capacitor in parallel having a very high impedance at its resonant frequency

Trapped dipole antennas
Looking at the sketch above, when working 40 m only the red wires are part of the antenna but when using 80 m the red and purple wires are the antenna

Trappola per dipolo 40/80m
Sono stati realizzati due circuiti risonanti di facile riproducibilità e meccanicamente di adeguata robustezza

The W3DZZ antenna for 40 and 80 meter band
Before you start, bee sure that you know exactly where you would hang the dipol