Portable Loop Antennapop
- This loop it is small and light enough to carry while operating, it disassembles into small but rugged pieces that fit easily in a backpack or gym bag, and it can be tuned from 14 MHz to 30 MHz.
This tunable magnetic loop antenna is my contribution to the well established art of amateur loop making. Can be tuned from 14 MHz to 30 MHz.
Integrated Tower Systems-ITS
- Premier OEM of portable tower systems, Communication-Site-on-Wheels (COWs), heavy-duty fixed foundation telescopic structures commercial and military, worldwide sales and leasing
How to select an amplifier
- Thierry LOMBRY, ON4SKY, develops in three long articles all you need to know about amplification, and how to seletc an HF and a solid-state amplifier, with pictures.
What is DX
- Some people say the "D" in DX stands for Distance, and the "X" stands for the unknown, meaning hearing unidentified stations until identified. Read more on meanings of DX in Ham Radio slang.
Smith chart calculator
- linSmith is a Smith Charting program, mainly designed for educational use. It allows defining multiple load impedances (different frequencies), and adding components (discrete components and line sections) in series and parallel. It plots the impedances on the screen, shows the values in table format, and is able to generate publication quality Postscript output.
- DotDash is a free morsetrainer for the Palm Pilot with features such as "Train Random Words", "Learn Alphabet", recognize random abbreviations, different speed settings, morse text as you write etc.