Skip to main content

Inverted Dipole Antenna Project for a Tight Space

If you have limited space for a multiband HF antenna, try using a "homebrew" inverted v dipole.

In this video from "Rob Braxman Tech", we see a step-by-step procedure for designing and using a simple inverted v dipole antenna.

As Rob suggests, this effort is a project in progress and will take some time to adjust performance and efficiency.

Here are some general comments from Rob:

I've set up an Inverted Dipole for use with my QRP HF Radio. Because it's QRP (Xiegu X5105), I wanted to do a good job with the antenna. I started with a painter's pole from Home Depot (extends to 23 feet), 12 awg household wire, and a cut off paintbrush which I initially used as the top of the painter's pole. The limitations of the project includes being in a hillside with a sloped backyard, and very little space. But I changed it and used a more permanent attachment with a Painters Pole adapter from and then PVC parts. This will make it easier to measure when the time comes. Each leg of the dipole was cut to approximately 33 feet. So 66 foot half wave. Height off the ground is around 26 feet. I can tweak this later and increase the height to 30 feet. Everything is adjustable. Painter pole has more length. Also, the height is not even since the bottom deck is actually suspended several feet above. So height above ground maybe better in some spots. The inverted dipole is tilted back. This is part of future experimentation to see if this is affecting the reception. I used the Xiegu X5105's SWR feature to scan the SWR for each band (really nice feature!) and this allowed me to quickly view where I have to tweak. This is not yet tweaked but it's passably resonant on 5 bands. Perfect for 40 meters which is what it was measured for. Did I hear any traffic? Barely. Maybe I have a QRM problem with a high noise floor being in the city. This is only step 1 of my journey. So that aspect of discovery will come later. Resonant at 40 Meters and 6 Meters. Partial resonance at 30, 17, 15 meters. I would have liked some resonance at 20 Meters but really bad SWR there. My feed line coax is 50 feet long. This is not a tuned length. It may have some impact. I coiled part of the feedline to act as a RF choke so the will reduce the length a little bit from 50 feet. I can experiment adding more coils (5 coils at the moment).


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