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30m Projekten - Antenne's

“Safari” 40-30m Roach Poke Vertical Antenna by G3RWF
There is nothing new in this short article but it may stir a few practical ideas. My efforts are all about minimum weight since I need to get it on a plane. I have quite a few roach poles but only take one on my foreign jaunts.
https://rsars.files.wordpress.com/2013/01/40-30m-safari-roach-pole-vertical-antenna-g3rwf1-31.pdf

30m Half -Size Rotary Dipole by G3YEU
The G3YEU QTH has a long but quite narrow weed patch and there is a need to keep the arms of the dipole from encroaching on the neighbours’ air space, so mounting the dipole as a V added some valuable feet.
https://rsars.files.wordpress.com/2013/01/30m-half-size-rotary-dipole-g3yeu-iss-1-31.pdf

Klik voor vergrotingDipolo Rotativo per 30/40 Mt da IK4DCS
Dopo aver fatto la verticale per 30/40 mt,e considerandone l'ottimo funzionamento, ho voluto riprendere il discorso del dipolo direttivo, già visto all'inizio di questa autocostruzione.
http://digilander.libero.it/ik4dcs/dipolo3040.html

Klik voor vergrotingMagnetic loop by F5SWN
The magnetic loop, thus named by the use of the magnetic component of the electromagnetic field, is a parallel circuit LC. The antenna is feeded using a coupling loop or a gamma, located opposite to the capacitor.
https://www.f5swn.fr/en/?Downtown-ham/Magnetic-loop

Klik voor vergrotingMagnetic Loop Antenna by 7N3WVM
Although a magnetic loop antenna is very compact, its efficiency is close to a half-wavelength dipole if carefully built. The key point is to make the loop element with material of low ohmic resistance.
http://www.qsl.net/7n3wvm/mag-loop.html

Klik voor vergrotingUne antenne verticale 10/14MHz à trappe coaxiale de F6GLZ
Cet article traite plutôt de la manière de construire une trappe coaxiale pour une antenne verticale.
https://jclaudegerwill.wordpress.com/2018/03/23/une-antenne-verticale-10-14mhz-a-trappe-coaxiale/

Creatie datum : 12/08/2007 @ 19:30
Laatste wijziging : 08/03/2019 @ 14:36
Categorie : 30m Projekten
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