Posts

Homebrew 4 band vertical. Post #1155.

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If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=xczCFzEZ1CY. A nice, simple video tutorial from Darrell Steele (VO1MDS) of St. Johns, Newfoundland, Canada.  In this video, Darrel uses a 16-foot/4.878 meters telescoping aluminium rod, a tapped coil, a coaxial cable feed line, and a simple ground rod to build a vertical antenna covering the 40, 20, 15, and 12 meter Amateur Radio bands.  Bands are selected by changing the tap on the coil. For the latest Amateur Radio news and information, please visit these websites: http://www.HawaiiARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.wordpress.com. http://www.kh6jrm.info (breaking news for radio amateurs). http://www.arrl.org. http://www.arrl.org/audio-news (updated every Friday). Other sites of interest: http://hawaiisciencedigest.com (science and technology news for radio amateurs). https://hawaiiintelligencedigest.com (

QRP RADIO: SPEAKER WIRE ANTENNA! Post #1154.

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If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=9Gyfb7fivuA. Here's nice, simple antenna made from common audio speaker wire. In this video from K9ARV, we see a simple arrangement that allows for multiband HF operation with a small QRP HF transceiver.  The match box was made by Nelson antenna and is sold on e-Bay.  Note how K9ARV uses available trees to disguise the antenna.  An antenna "tuner" and a suitable ground radial/counterpoise system will enable you to get maximum performance from this basic wire antenna. For the latest Amateur Radio news and information, please visit these websites: http://www.HawaiiARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.wordpress.com. http://www.kh6jrm.info (breaking news for radio amateurs). http://www.arrl.org. http://www.arrl.org/audio-news (issued each Friday). Other sites of interest: http://hawaiisciencedigest.c

HF Field Ops Gear-up. Dipole Antenna Tuning. Post #1153.

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If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=cgdP8ao71Cc. Interesting video on how to set up and tune a dipole antenna in field conditions. Note the use of 450 ohm ladder line as the antenna feed line, which enables multiband HF use.  While this particular antenna is designed for 40 meter NVIS (near vertical incident skywave) use, it can be used on bands above 40 meters with ladder line and an antenna "tuner."  The 40 meter version of this antenna can be useful up to approximately 300 miles/486 km--great for local and regional contacts. For the latest Amateur Radio news and information, please visit these websites: http://www.HawaiiARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.wordpress.com. http://www.kh6jrm.info (breaking news for radio amateurs). http://www.arrl.org. http://www.arrl.org/audio-news (issued every Friday). Other sites of interest: http:

Ham Radio - Build your own L network antenna tuner. Post #1152.

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If you can't view the video, please enter this title URL into your browser search box: https://www.youtube.com/watch/v=EXD9rAOM_o4. Here's a simple, easy to build, and low cost L network antenna "tuner" that will maximize the performance of a random wire antenna.  Kevin Loughin (KB9RLW) shows us how to use locally available materials to design, build, and use this useful tool for antenna designers.  Kevin's instructions are clear and easy to understand.  Add to this "tuner" a ground radial or counterpoise system and you will have a high performing portable multiband HF antenna.  You may want to enclose this "tuner" in a small metal box to protect it from the weather and to reduce RFI to a minimum. For the latest Amateur Radio news and information, please visit these web sites: http://www.Hawaii ARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.wordpress.com. http://www.kh6jrm.info (breaking news for radio amat

Chameleon P-LOOP 2.0 Portable Magnetic Loop Antenna Field Test. Post #1151.

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If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch/v=Rfbnt4-xg1g. HF magnetic loop antennas are becoming popular with portable, emergency, and home operations.  Radio amateurs have used these fascinating, man-portable antennas where other antennas aren't practical or desired, especially in deed-restricted homes and apartments governed by HOAs and CC&Rs. In this video, OH8STN field tests the Chameleon P-LOOP magnetic loop antenna in a practical situation with less than friendly weather.  Despite its limited bandwidth, the magnetic loop antenna is small, easily assembled, and completely portable--something to consider if you're hiking into a remote area or forced to erect temporary antennas in less than favorable housing conditions. Considering its limitations, the Chameleon P-LOOP does fairly well outdoors and should be considered a useful standby antenna for your next Field Day or portable oper