Simple Ham Radio Antennas

A fun and not necessarily "scientific" demonstration on how larger diameter radiating elements of an antenna will provide wider bandwidth coverage. To keep weight and structure support under control, Larry (WD0AKX) chose the 2-meter band for his fascinating experiment. Using a frequency of 147.861 MHz as the design frequency, Larry makes antenna elements ranging from 1/16-inch to 3-inches in diameter to test his theory. His rudimentary tests confirm that larger diameter antenna elements do widen the bandwidth a bit on 2-meters. The same principle applies to HF operation, where classic "cage" dipoles, folded dipoles made from 300-ohm tv ribbon line, and fan dipoles often are used to broaden bandwidth. Overall, the video is well done and shows how simple antennas can be improved with just a few simple tools and instruments. If the video doesn't cue up immediately, direct your browser to: http://youtu.be/sLHOIG7O7w. You can also enter the title directly to ge

Free online magazine Antentop 01- 2014 is ready. : " Free online magazine Antentop 01- 2014 is ready. Hi. Free online magazine Antentop 01- 2014 is ready. It contains 41+ topics, including: Antenna Theory : Linear Array Theory- Part II; HF - Antenna Practice: 44 Feet Dipole. Where is theTruth?: Lawn Antenna: Buried Antennas for  Emergency Communications: Simple Broadband Antenna for the 40- meter Band : Directional Antenna UA6AGWV. 7.00: Antenna UA6AGW in Experimenters byRU1OZ : Antenna UA6AGW V.40.20:Field Antenna UA6AGW V.40.21: Shortened Antenna G5RV for 14- 50- MHz Bands: Shortened Dipole Balcony Antenna for the 20- meter Band : Simple Window Loop Antenna : Simple Folded Dipole Antenna for the 20- meter Band: Simple Wire Antenna for All HF- Bands: Twin Triangle Antenna for the 10- meter Band: Compact Twin Delta Antenna for the 80- and 40- meter Bands: Delta Antenna for 80-. 40-, 20- and 15- meter Bands:Windom UA6CA for 80-, 40-, 20- and 10- meter Bands: Air Plane HF

Part one of a two-part series on HF propagation. Although I've been unable to find Tyler's (N7TFP) second chapter of the series, the first video is more than adequate in explaining the basic theory behind HF propagation. This tutorial is well-produced, easy to understand, and informative. This video would make great supplementary study material for those taking a Technician Class Amateur Radio Course. Perhaps, someone has found the second part of the series...I surely hope so, because the first video is especially well done. For the latest in Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daily. You can follow our blog community with a free email subscription or by tapping into the blog RSS feed. You can find more Amateur Radio happenings by visiting my news site at http://kh6jrm.net. Thanks for joining us today! Aloha es 73 de Russ (KH6JRM).

TVTechnology: Low-Level RF Signals Allow Hackers to Grab Data From Laptops : "Low-Level RF Signals Allow Hackers to Grab Data From Laptops. No Wi-Fi required. As anyone who has tried to use a portable AM or shortwave radio near a computer knows, computers emit a variety of RF signals over a wide range of frequencies. The emissions can extend into the VHF bands. Although these emissions are considered noise or interference, the reality is they contain information about what's happening inside the computer. Researchers at the George Institute of Technology are studying these emissions to help hardware and software designers develop strategies to plug these RF data leaks. Alenka Zajic, an assistant professor in Georgia Tech’s School of Electrical and Computer Engineering, explains, “People are focused on security for the Internet and on the wireless communication side, but we are concerned with what can be learned from your computer without it intentionally sending anything

A very simple, stealth antenna that produces good results without being seen by nosey neighbors. Basically, Tony has built a 3-band vertical with all elements connected to a single SO-239 connector and a radial ground system. Tony's antenna resembles a vertical fan dipole, with the radial system supplying the "missing half" of the antenna. I've built several antennas following Tony's basic design. They all work very well and no one in the neighborhood knows the antennas are there. Of course, there are tradeoffs. This antenna won't bust a pileup or get you 59+ reports all the time. But it does work. And, sometimes that's all you need to get on the air without being noticed by the HOA/CC&R "police." Good luck! For the latest Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daily. For more Amateur Radio news, please visit my news site at http://kh6jrm.net. Thanks for joining us today!