Skip to main content

Simple Ham Radio Antennas--"Umbrella" Antenna for 80 MTRS and up. Post #886

"Umbrella" Antenna for 80 MTRS and up
Accessed on 05 September 2016, 00:25 hrs, UTC.
Reporter:  N4SPP.
Please click title or URL to read the full article.

Here's an interesting idea for an 80 meter vertical antenna that doesn't require a lot of space.

The "Umbrella" antenna is basically a top-loaded vertical with an attached wire capacity top hat that is sloped down from the top of the antenna.  This antenna bears a striking resemblance to the discone antennas often used in VHF, UHF, and public service bands.  For better performance, you can connect the individual sloping wires to a perimeter wire "skirt."

The materials required for this antenna project are modest:

Two, 6.5 meter/21 ft fiberglass fishing poles or telescoping rods.
24 gauge wire.
300 ohm television twinlead.
An antenna transmatch (i.e. "tuner").
2 meters/6.56 ft of PVC pipe.
4 elevated radials, each about 6.5 meters/21 ft long.

The article is fully illustrated with diagrams, photos, and plots of performance.

Top-loading is a useful way to get 1/4 wavelength performance without increasing height.  When I retired from Pacific Radio Group, our AM station (KHLO-AM, 850 kHz) was using a top-loaded vertical antenna.  The antenna worked very well, considering the restrictions imposed by the tower's proximity to the Hilo, Hawaii International Airport.

Perhaps this "Umbrella" antenna is something you could use at your ham shack.
For more antenna and propagation articles, please check out the blog sidebars.

To get the latest Amateur Radio news and information, please check out my news site:

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).


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: 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: (a wee

Amateur Radio Bicycle Mobile Setup. Post #1554.

If you can't see the video, please insert this title URL into your browser search box: 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: (a weekly podcast which is updated each Friday afternoon). (Amateur Radio News & Information).

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 lack