VHF – UHF 142 – 450 MHz Log-periodic Antenna
Schematics of a Dual Band Log Periodic Antenna by VA2PHI
Category Archives: Homebrew
6m/10m Dual Band mobile whip
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
2m Folded Dipole
Simple 2 meter folded dipole antenna
6m 1/2 wave Melrose Vertical
A simple coax vertical antenna for six meter band
VK5AH – HF 4 Bander Antenna Construction & Adjustment Tips
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
40m/80m Lake Eyre Portable
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.
G5RV All-Band HF Antenna
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.
T-MATCH ATU
C1 250pF or more C2 250pF or more L1 31 mH 39 turns, 2 Inches (51mm) Diameter, 4 Inches (102mm) long. Tapped at 20T, 14T, 9T, 5T L2 0.25 mH 4 turns 1.2 Inches (30.5mm) Diameter, 2 Inches long. I used silver plated copper wire for L1 and L2. If you use enamelled copper wire,
EH Antenna for 80 M
EH Antenna for 80 meters band,
an ultra compact antenna for 3.6 MHz
10 meter Moxon Yagi Beam
A moxon beam antenna for 10 meters band