Skip to main content

Simple Ham Radio Antennas--Vertical Antenna for DX. Post #445.


If you have trouble viewing this video, please enter this URL into your browser: http://youtu.be/aOizaRd3Qtk. Another excellent antenna tutorial by Stan Gibilisco (W1GV). This time, Stan discusses the theory, construction, and use of a 40 meter vertical antenna for DX. Vertical antennas perform well if they are used in conjunction with a good ground radial system. The radial system supplies the missing half of the vertical element. With a decent radial system, this vertical directs most of its radiation toward the horizon. If you cut the vertical and radial wire lengths for a frequency in the lower portion of the 40 meter band (below 7.100 MHz), the antenna will work very well in the SSB portion of 15 meters as a 3/4 length antenna. This assumes you are feeding the antenna with 50 ohm coaxial cable. If you want multiband use between 40 and 10 meters, feed the antenna with ladder line or tv twinlead. The balanced feeders would then go into a balanced tuner and then on to your transceiver. You could also feed the balanced feeders into a 4:1 balun and then attach the balun to your tuner with a short length of 50 ohm coaxial cable. My current 40 meter vertical is built on the idea advanced by Stan Gibilisco. My ground radial system consists of 16 quarter wavelength radials attached to one leg of some 450 ohm ladder line, with the other leg of the ladder line connected to the vertical element. For now, this antenna serves me well as a general HF antenna. For the latest Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daily. You can follow our blog community with a free e-mail subscription or by tapping into the blog RSS feed. Thanks for joining us today! Aloha es 73 de Russ (KH6JRM).

Comments

Popular posts from this blog

G5RV Multi Band HF Dipole Antenna. Post #1555.

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 weekly podca…

Amateur Radio Bicycle Mobile Setup. Post #1554.

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).
https://www.eha…

An 80-Meter Vertical Helix

Like many amateur radio operators, I live on a small lot surrounded by neighbors, utility lines, and civic-minded citizens concerned about the "attractiveness" of my community.  Whether by design or outright fear, I've adopted the "stealth" approach to ham radio antennas.  It's the old "out of sight, out of mind" idea applied to amateur radio antennas.

The amateur radio press is full of articles describing the struggle of amateur radio operators to pursue their hobby under the burdensome regulations of CC & Rs, HOAs, and other civic minded citizens who object to antenna farms.  So far, my modest verticals, loops, and inverted vees have blended well with the vegetation and trees bordering my small backyard.  Vertical antennas have always been a problem because of the limited space for a radial system.  There are times, however, where a shortened vertical for the lower HF bands (such as 80/75 meters) is necessary where horizontal space is lacki…