Simple Ham Radio Antennas--Vertical Dipole in Tree


If you're having trouble viewing this video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=RI2_T-LeYEU. This is post #990 in a continuing series of Simple Ham Radio Antennas.  Here's another dipole antenna for those lacking the space to install a full-length horizontal HF dipole.  This antenna is vertical dipole fed with 450 ohm ladder line and arranged so that each element is suspended from a tall support such as a tree or telescoping fiberglass mast.  Stan Gibilisco (W1GV) does a good job of explaining the theory, construction, and use of this dipole variant. If the dipole is cut for the lowest frequency of operation and fed with ladder line, television twin lead, or  homemade balanced feeders, you will have a cheap, easily made dipole capable of covering several HF amateur radio bands.  An antenna transmatch (i.e. "tuner") with a 4:1 current balun is needed to match the feed line impedance to the impedance of your rig.  At my vacation home in the Puna District of Hawaii Island, I have a similar antenna covering the 20 to 10 meter amateur radio bands. The top end of the dipole is attached to a tree limb about 35 feet/10.67 meters above ground level.  Each element is a quarter wave piece of #18 AWG speaker wire connected to a center insulator and fed with 50 feet/15.24 meters of 450 ohm ladder line.  Each antenna element measures 16.6 feet/5.06 meters, which, with my "tuner"/balun combination, covers all amateur radio bands from 20 t0 10 meters.  As in Stan's example, all of my materials were obtained locally at no cost, thanks to garage sales and some supplies I had in the shack.  This antenna works very well and can be used as a portable or emergency HF 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://hawaiiscience digest (latest science and technology news).

Be sure to check out the blog sidebars for more antenna and propagation articles.

Opinions expressed in this blog are mine unless othewise stated.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

Related articles

Comments

Post a Comment

Thank you for visiting my Amateur Radio Blog. I value your comments and suggestions. For Amateur Radio Antenna Topics and Discussions, stay here. For Amateur Radio News and Trends, please visit my news site at https://bigislandarrlnews.com.
Aloha es 73 de Russ (KH6JRM).

Popular posts from this blog

G5RV Multi Band HF Dipole Antenna. Post #1555.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=aeNHIQ_j4Dk This well-produced and richly illustrated tutorial on the classic G5RV HF Dipole Antenna was presented to the Brandon Amateur Radio Society in Brandon, Florida in 2017 by Bernie Huth (W4BGH).  Bernie does an excellent job of  explaining the pros and cons of this popular HF antenna from the late Louis Varney (G5RV).  Although Varney envisioned his design primarily as a 3/2 wavelength antenna for the 20 meter Amateur Radio band, radio amateurs have used the antenna for multiband use.  The G5RV is an excellent choice for the 20 meter band.  Performance on other HF Amateur Radio bands is good enough to qualify as stand alone HF antenna if you can only erect one HF antenna. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a wee
Read more

Antenna for Condo Backyard-Stealth. Post #1542.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MXTYTytR56A. Don't let deed-restricted properties (HOA/CC&R) stop you from enjoying Amateur Radio.  In this video from AC2RJ, we see how some well-placed trees, a camera tripod, a telescoping fiberglass mast, and a "V" antenna can get you on the air without a lot of effort.  Add an antenna "tuner", a sturdy rig, such as the Yaesu FT-817, a microphone/cw key, and a simple grounding system, and you have a fully functional, nearly invisible ham station in your backyard. For the latest Amateur/Ham Radio news and information, please visit these web sites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://amateurradionewsinformation.com (Amateur Radio News &
Read more

Amateur Radio Bicycle Mobile Setup. Post #1554.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2zWb-KnkGdY. Here's a way to use Amatuer/Ham Radio while you work on shedding a few pounds in useful exercise.  Why not equip your bicycle for 2 meter/70 cm mobile operation? In this short, well-made video, "taverned" shows us how he used a mag mount antenna, a simple C clamp, and a basic ground system to convert his mountain bike into a mobile station.  The project is straight forward, simple, and gives you emergency communications while you peddle down the road. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://amateurradionewsinformation.com (Amateur Radio News & Information).
Read more