I have heard for many years of the great challenge of putting up a DX antenna for then actually getting it to work. So, I decided to give it a try after all these years. Below are the details of my antenna which is a new twist on a well established antenna.
Tune Around! The original Cobra antenna designed by W4JOH can be built as an all band hf antenna covering either thru 10 meters or 80 thru 10 meters and is built using standard insulated wire of about 14 gauge and fed with ohm ladder line down to the shack into a tuner. It got it's name from the S shaped configuration of it's multi-conductor elements.
Orfanidis - Lots Of Math! Also shows basic station interconnections - From Hamuniverse. This document has been recently upgraded to take advantage of the CSS system and have also added a button to allow the note to be downloaded as a PDF.
This antenna allow to reduce noise on both bands. The stand alone 80m loop is approximately four feet in diameter. And made of light weight material. Which makes it ideal for portable use or you can mount it above a pre-existing vhf antenna, and due to it's small size it is quite rotatable.
It surprises some people to learn that, though cell phones offer inexpensive, instantaneous communication worldwide, there are still millions of active ham radio operators around the world. We like to say that there is something for everyone in our hobby. Some of my fellow hams are actively engaged in supporting disaster relief efforts they were an especially critical part of the still-ongoing recovery in Puerto Rico.
My homemade amateur radio antenna for the meter band is the result of many considerations, inner debates and tests. This Page Covers 1. The Compromises 2.
If you're not getting the top-band results you expected, you'll find these antenna tips of use. It is always a pleasure to welcome newcomers to the "gentlemen's band," as meters has been called for many years. But few have signals that rattle the walls in my shack.
Related wiki pages BandsPropagation Antennas. It is slightly higher in frequency than the AM broadcast band kHz - kHzand behaves similarly. Most amateur HF equipment supports the metre band.
Add PropagationStats to your site. While this certainly was a huge improvement over my humble Butternut multiband verticalmy new tower had a major shortcoming A few years ago, I acquired a multiband commercial antenna called a half-sloper.