The following are construction details of a 5 element 20 meter monobander antenna originally published by VE3GK. However, this particular yagi was run through a computer program and performed very well. It was also scaled to 70 cm on a test range by the late VE3UD, Bud Punchard and the results compared with the computer…
Category: HF Antennas
HF Mobile multiband antenna
VE3GK posted this interesting project about an HF Mobile multiband antenna. Can be remotely tuned.
G5RV more ideas
The G5RV multiband antenna is a very popular design on the HF bands. The “common” G5RV is configured as a 3/2-wave dipole on 20 meters, and works as either a shortened dipole, or a collinear-fed long wire on the other bands. In this configuration, the overall length is 102 ft, with a 28 to 34…
Beverage antenna information
The Beverage (or “wave”) antenna was invented in the early 1920s by Dr. Harold H. Beverage. It was first discussed in a paper titled “The Wave Antenna – A New Type of Highly Directive Antenna” written by Beverage, Chester W. Rice and and Edward W. Kellogg for the journal of the American Institute of Electrical…
20 meters QRP Dipole
This is a portable dipole I built for 20 meters. It works great. The SWR is really low. I would not recommend this for permanent use just because it is not build like a rock. It will do just fine for portable in the field operation. It is a great backpacking antenna. I only used…
Petlowany Antennas by K6NO
If you have any interest in antennas at all, fasten your seat belts and hang on to your hats, because what you are about to read here is going to blow you away. Conventional wisdom concerning antenna matching and resonating is about to be shattered and the principles revealed here might just be the start…
Rhombic Antenna
Rhombic Antenna dimensions and plan for HF and VHF bands by N6JSX
Boomless Quad
A Quad antenna is a full wavelength conductor in the form of a square (or circle or diamond). It is actually two half wave dipoles spaced half wave length apart, bent at right angles at l/8th wavelength points and joined together. If the Quad is fed at either sides it is vertically polarized and if…
The Adcock HF RDF Antenna
The Adcock antenna has been used for a long time for RDF. It is basically an interferometer. When both of the two dipoles see exactly the same signal strength and RF phase, no signal is delivered to the receiver. This condition happens only when the signal source is equal distance from the two dipoles. As…
An Improved Multiband Trap Dipole Antenna
You need this—traps with lower loss, higher Q, increased power-handling capability and four-band coverage! This improved multiband trap dipole introduces a new trap design and a change in trap location. The antenna features double-coaxial-cable-wound traps having lower reactance and a higher quality factor (Q) than earlier coax-cable traps. . Article published on QST, author and…