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.
Adjusting Straight Keys, Paddles, & Bugs
How to adjust a morse key, adjusting bencher, paddle, straight morse key.
Is this Ewe for You?
The article titled “Is this Ewe for You?” by Floyd Koontz, WA2WVL, published on QST February 1995 presents a simple yet effective receiving antenna design tailored for 80 and 160-meter DXing. As solar activity decreases, making MF and HF signals weaker and ambient noise stronger, serious DX operators seek improved signal-to-noise ratios through directive receive…
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.
Efficiency of the Z Match
Lloyd Butler VK5BR evaluated the power efficiency of various Z Match Tuner configurations across antenna load conditions, uncovering discrepancies in performance across different frequencies and load resistances.
Yaesu FT-991 Memory Manager
The FT-991 Memory Manager is a freeware program created by F6ECN designed to assist in managing, programming, and remotely controlling Yaesu FT-991 and FT-991A ham radio transceivers. It is compatible with Windows 7 through 10, on both 32 and 64 bit systems. While the primary user documentation is in French, the software’s latest version, 2.2.7.5, is available for download.
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