Posts

144 MHz 4 element yagi - dimensions. Post #1231.

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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=XgQFJYCXpo. Another excellent video tutorial from Peter Parker (VK3YE).  This time, Peter builds a 144 MHz, 4-element yagi antenna.  The emphasis in this video is on dimensions and proper spacing of antenna elements.  This antenna is suitable for a variety of amateur radio uses, including portable/emergency operations, 2-meter SSB, and DX-peditions.  As configured by Peter, the antenna is horizontally polarized. You could add a gamma match to provide a bit more spectrum. For the latest Amateur Radio news and information, please visit these websites: http://www.HawaiiARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.com. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information). Other sites of in

Homebrew 10/20/40m EFHW vertical Antenna "SOTA". Post #1230.

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If you can't view this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=29CA_IPyg9M. This end-fed halfwave antenna from 2E0VOV is based on the popular "Par Endfedz" QRP multiband antenna.  In this case, 2E0VOV used a FT140-43 toroid with a total of 16 windings and a 100 pf capacitor across the feed point. The 40 meter loading coil is made from 58 feet/17.68 meters of enamel wire wound tightly on a 20 mm form. A good, simple, inexpensive antenna suitable for portable and emergency operations. For the latest Amateur Radio news and information, please visit these websites: http://www.HawaiiARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.com. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information). Other sites of interest: Hawaii Science Digest (https://p

ATS3B QRP QSO with Indoor Antenna. Post #1229.

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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=H_GGGW9usTQ. If you're hardpressed to get on the air from a deed-restricted property, you may find this quickly designed and built indoor antenna from JC Haywire a possible solution.  The wire antenna was suspended from a support in his apartment stairwell.  Here's the project description: It was a speaker cord from the Walgreens down the street. I split the cord, put one side up the stairwell and tied it to a curtain rod--put the other end into the kitchen and laid it on the floor--and I was getting out of that wood-framed bungalow pretty well. I used an alligator clip to 'ground' the rig and the counterpoise wire to the chair I was sitting in. That's it. Radio is fun! Fairly crude, but it works! For the latest Amateur Radio news and information, please visit these websites: http://www.HawaiiARRL.info. https://oahuarrlnews

2 Meter 3 Element Tape Measure Yagi Antenna. Post #1228.

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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=rxZ4rr2aKo. According to KF7TOV, only a few hours are needed to make this portable 2 meter, 3 element yagi antenna.  Most of the parts should be available at the nearest home improvement or building supply outlet.  Your total cash outlay should be around $15.00.  You will find this yagi useful for both home and portable operations, including radio direction finding ("foxhunts") activities. For the latest Amateur Radio News and Information, please visit these web sites: http://www.HawaiiARRL.info. https;//oahuarrlnews.wordpress.com. https://bigislandarrlnews.com. https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information). http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). Other sites of interest: Hawaii Science Digest (https://paper.li/f-1476233615). Hawaii

Inexpensive antenna mast. Post #1227.

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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=SG9AgVbDxHM. If you need a quick, short antenna mast, then this idea from "Theoffroader" may prove useful.  The antenna was made from surplus lumber and a few hinges. The mast can be lowered when it's not in use--a great idea for a stealth antenna. This short mast (approximately 10 feet/3.04 meters) could be used to support a VHF or UHF antenna. For the latest Amateur Radio news and information, please visit these web sites: http://www.HawaiiARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.com. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://paper.li/kh6jrm/1430289353 (Amateur Radio News & Information). Other sites of interest: Hawaii Science Digest (https://paper.li/f-1476233615). Hawaii Intelligence Digest (https://hawaiiintel