Nice links ..
TECHNICAL TOPICS AND INFORMATION This new magnetic-sensitive foil <http://www.gizmag.com/magnetic-sensing-skin/35902/> , when applied to the skin, could give people a sense of "magnetoception". Maybe you could literally keep in touch with your ham radio friends? As contributor Dennis N6KI suggests, "Just think of all the possibilities!" The best way to secure a tower's grounding wire to its ground rod is by welding and the easiest way to make that weld is Erico's CADWELD Exothermic Welding process. Among the line of Erico products now carried by DX Engineering <http://www.dxengineering.com/search/brand/erico> , the "one-shots" make copper-to-copper or copper-to-steel electrical connections without the need for outside heat or power sources. The result is a permanent bond that won't loosen or corrode over time, which is important for lightning protection. http://www3.arrl.org/nl/cu/image/Contest%20Update%20-%202015%20Feb%2025/Grey %20Line%20Map.jpg This online grey line map <http://dx.qsl.net/propagation/greyline.html> is a handy resource that lets you keep an eye on propagation opportunities while your ears are busy listening for the bands to open. Jeff ACØC recently upgraded his FTdx5000 radio and documented <http://www.ac0c.com/main/page_ft5k_cw_occupied_bandwidth.html> a very significant improvement in occupied transmit bandwidth - a major improvement over previous versions and another good step in the direction of cleaner transmit signals. Talk to your Yaesu dealer about installing the upgrade firmware package. (Thanks also, Jim K9YC) If you are rebuilding old radios and are looking for the right capacitors and other components, Hayseed Hamfest <http://www.hayseedhamfest.com/> offers kits of components to save you a lot of shopping. You can then use the new-found spare time to make your own artisanal vacuum tubes <http://hackaday.com/2014/11/21/artisanal-vacuum-tubes-hackaday-shows-you-ho w/> ! (Thanks, Kelly VE4XT and Tim K3HX) Owen VK2OMD (ex-VK1OD) published a lot of excellent technical material on a variety of topics but the site was off-line for a time. I'm pleased to report that Owen is back online <http://owenduffy.net/blog/> ! While grappling hooks are usually associated with movie-style prison breaks, rock-climbing, and various forms of pilferage, this High-Performance Grappling Hook <http://www.instructables.com/id/High-Performance-Grappling-Hook/> from the Instructables project archives might have a home in your ham radio tower tool tote! Technical Web Site of the Week - Carl K9LA has a new post on his website, a review of one-way propagation <http://k9la.us/Feb15_One-Way_Propagation_Revisited.pdf> . Carl has also created a history of his propagation columns <http://k9la.us/html/monthly_feature.html> for the now-discontinued WorldRadio and CQ Plus. (From ARRL Propagation Bulletin ARLP008) Brazos Valley Amateur Radio Club Greater Houston Hamfest ARRL Texas State Convention 2015 GHH 2015 Logo CroppedSignature Texas Convention Logo with stars
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