This 4m Slim Jim is cheap and easy to build yet it greatly out performs the more usual dipole due to its low angle of radiation. An SWR of 1:1 is obtainable across the 4m FM band with simple adjustment. The photograph and PDF diagram show the construction, however a brief description is also given….
Author: Simone
Born in 1970 currently live in Florence Italy.
Married with 2 childrens work as IT Technician.
Understanding Solar Indices
By Ken Larson, KJ6RZ Long distance HF radio communications is made possible by a region of charged particles in the Earth’s upper atmosphere, 30 to 200 miles above the Earth’s surface. This region is called the ionosphere.
Rewinding Power Transformers: Considerations and Step-by-Step Guide
Transformers are vital in radio projects, often salvaged for reuse. Understanding their power handling, testing methods, and rewinding techniques can enhance your projects while reducing costs significantly. Happy winding!
J-vertical Antenna for 10 meters band
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…
VHF – UHF 142 – 450 MHz Log-periodic Antenna
Schematics of a Dual Band Log Periodic Antenna by VA2PHI
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.