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Helical Coil calculator

The inductance and self capacitance of a helical coil can be determined by entering its dimensions in the boxes above. The length of wire used is also calculated
post 25 Sep 2020

Coils Traps Antennas Links


Verticale 10 MHz con bobine
Nella nostra ricerca e sperimentazione di antenne accorciate, per chi non ha spazi e deve arrangiarsi

Why I Don't Like Trap Antennas
So let me tell you why I choose or design antennas the way I do

Wire trap for 12m WARC band
Wire traps are cheap, easy to assemble in a reproducible manner, but can be mechanically fragile easily deformed , good for permanent operation, on dipoles, inverted-V's etc

Inverted-V Antenna for 3.5, 7, 14, 21 & 28 MHz
Trap-style Inverted-V Antenna for 3.5, 7, 14, 21 & 28 MHz i.e. 10 to 80 metres