Article by EI9GQ My first J vertical was a Slim Jim for two metres. This simple aerial performed better than a centre fed dipole at the same height. I compared it with an end fed half wave and an end fed 5/8 wave vertical. The Slim Jim always gave better results. SLIM JIM When I
This antenna is made from either an old CB whip or a stripped-down 2m 5/8 whip. When you strip down and re-shrink an antenna, be careful because some heat shrink tubes can change the antenna’s resonance, especially with helical windings. You can use a piece of 20mm conduit for the former of L2 with a
A simple coax vertical antenna for six meter band
In this article, VK5AH shares his know-how on building and tweaking the HF 4 Bander antenna. Packed with practical advice on setting it up, making adjustments, and understanding its performance
While camping by Lake Eyre, VK5AH invented a new antenna, better than the mobile whip. It clips onto the mobile mount and is hoisted onto a nearby tree. It works well at a 45-degree angle and can be adjusted for 160 meters.
This article discusses the characteristics of a 102 ft. center-fed dipole antenna strung between two 37 ft. poles. It explores predicted feedpoint impedance variations across different frequencies and the corresponding impact on the VSWR for various feedlines, based on EZNEC antenna modeling software predictions. It also analyses how alterations in element lengths of antennas significantly affect their performance at higher frequencies.
EH Antenna for 80 meters band,
an ultra compact antenna for 3.6 MHz
A moxon beam antenna for 10 meters band
By Kees Wiegers, PA5CW (ex-PA3BHS) It looked impossible to get a large beam for 20 meters up a tower, but it was something I always wanted. So after attending a presentation by John Devoldere, ON4UN, of Merelbeke, Belgium, I decided to try and build my own beam. At the presentation, John demonstrated software for designing
Article by M0DGQ This yagi antenna is particularly suitable for those with small plots ( myself included ) who wish to use a 2 element 20m yagi. The design is by AB4GX, the original article is listed below ( PDF ). Here different materials have been used for construction as these are easy to obtain