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Simple Ham Radio Antennas--W5ALT Indoor Vertical Antenna. Post #943.

W5ALT Indoor Vertical Antenna (http://www.dxzone.com/cgi.bin/dir/jump2.cgi?ID=30221). Accessed on 06 November 2016, 03:55 hrs, UTC. Author:  Walt (W5ALT). Please click link or insert title URL to read the full article. Comment: Fascinating article from Walt (W5ALT) on how to design, build, and use an indoor vertical antenna. According to Walt, this simple, base-loaded vertical made from readily available parts enable him to work over 100 countries, all 50 U.S. states on HF, and over 100 grid squares on 6 meters using SSB, CW, and PSK 31 from his apartment in Maracaibo, Venezuela. The key to this antenna's success is the large, tapped loading coil at the antenna's base and an effective radial or counterpoise system. Walt also dismisses some of the common myths concerning indoor antennas and says a properly designed indoor vertical antenna will work well if you pay attention to detail and work at lower power levels. Although this antenna won't match the perfor

Simple Ham Radio Antennas--How To Install an S9 Vertical Antenna. Post #941.

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If you're unable to view this video, please enter this title link into your browser search box: https://www.youtube.com/watch?v=ry4r3ggIcqE.  Excellent instructional video on how to install an S9 Vertical Antenna.  The video captures the step-by-step process of assembling and using this popular vertical HF antenna.  The fiberglass mast is simple, sturdy, and portable.  Be sure to install a good radial ground system and use a 4:1 UNUN with your antenna transmatch (i.e. "tuner").  A 7 type, 73 beads choke was used on the 50 ohm coaxial feed line.  The mast support was a galvanized water pipe bought at Home Depot. For the latest Amateur Radio news and information, please visit my news sites: https://www.kh6jrm.info (breaking news of interest to radio amateurs). https://bigislandarrlnews.wordpress.com (ARRL news and information for Hawaii Island radio amateurs). For the latest science and technology news, please visit http://hawaiisciencedigest.com. For the latest

Simple Ham Radio Antennas--Doublet Antenna. Post #941.

Doublet Antenna (http://www.ai4j.com/Projects/antennas/doublet.com). Author:  AI4J. Accessed on 04 November 2016, 04:15 hrs, UTC. Please insert title URL to read the full article. Comment: One of the best all-around multiband HF antennas is the "Doublet".  This antenna is simple to build, easy to erect in a variety of configurations, and inexpensive. The doublet is basically a dipole cut for the basic frequency of interest and fed with balanced feed line, such as 450 ohm ladder line, 300 ohm television twin lead, or homebrewed 600-ohm balanced line.  The balanced feed line is connected to a balanced antenna "tuner" or to a 4:1 balun/"tuner" combination and then attached to your HF transceiver with a short length of coaxial cable. This arrangement allows the doublet to cover amateur radio frequencies between 80 and 10 meters, depending on the lowest frequency selected. In this post, AI4J outlines the advantages/disadvantages, construction practi

Simple Ham Radio Antennas--Impedance Matching 101. Post #940.

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If you're unable to view this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=QLUrwoHRLJM.  Thanks to Ray Waldemar for capturing this presentation by H.Ward Silver (N0AX) at Pacificon 2012. This discussion by Mr. Silver is a great introduction to the methodology and techniques to achieve optimum energy transfer between an electric circuit source and the load.  Knowing these fundamentals allows us to get maximum performance from our antennas.  Mr. Silver writes for ARRL's "QST" magazine. -------------------------------------------- For the latest amateur radio news and information, please visit my two news sites: http://www.kh6jrm.info (breaking news of interest to the amateur radio community). https://bigislandarrlnews.wordpress.com (ARRL news and information for Hawaii Island radio amateurs). Opinions expressed in this blog are mine unless otherwise stated. Be sure to check out the blog sidebars for more a

Simple Ham Radio Antennas--The Earchi S9 vertical antenna. Post #939.

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If you're unable to view this video, please insert this title link into your browser search box: https://www.youtube.com/watch?v=V1j2Re62Abc.  Here's another antenna for those whose horizontal space limitations preclude a half=wavelength dipole. In this video, "The Radio Hobbyist" shows us how a 31-foot/9.45 meters fiberglass pole from LDG electronics can be configured into a 40-6 meter vertical antenna. The secret to this antenna's operation is a trifilar-wound 9:1 UNUN (unbalanced to unbalanced) toroid match transformer that will match the end-fed wire supported by the S9v31 fiberglass mast.  This inexpensive, lightweight (4 pounds/1.81 kilograms), end-fed antenna is easily assembled and taken down.  This antennas can be used for portable, emergency, or even home use. ------------------------------------------- For the latest amateur radio news and information, please visit my news sites: http://www.kh6jrm.info (breaking news of interest to the amateur rad