A Co-ax Trap Dipole For 40, 30 and 20 Meters
Having made lots of dipoles, but never a trapped antenna, I started by doing some reading on the subject Coax traps wound on thin plastic formers would be cheap and lightweight
post 22 Dec 2021
Coils Traps Antennas Links →
Multiband trap dipole antenna
Coaxial traps work as loading coils below their resonant frequency, thus reducing the overall length of the dipole
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
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Coaxial traps work as loading coils below their resonant frequency, thus reducing the overall length of the dipole
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
Sono stati realizzati due circuiti risonanti di facile riproducibilità e meccanicamente di adeguata robustezza
Before you start, bee sure that you know exactly where you would hang the dipol