Hits
20 Meter hamstick mini beam project
Element kits to be mounted so the elements are at 90 degrees from one another, the antenna was resonated to 14250 Khz
post 29 Jan 2024
Antenna 20mt 14 Mhz Links →
A 20 Meter Half Square Antenna for QRP Portable Operation, KA1DDB
The half square is made of a two strand computer ribbon cable 100 feet long, 47 feet of which is used for the balanced feed line
An Hexagonal Beam in 3 hours
The HEX has a very small wingspan, but no loading coils or traps Therefore it does not have the losses associated with such devices It appears to perform much as a full size 2 element yagi, but with a better match to 50 Ohm coax, comparable gain and f/b, but with a bit less bandwidth Physically, it is very light and strong. It can be multibanded by nesting elements one inside the other, like a multi-band Quad
Antenna HF Portable for 20 meters
Here's an easily transportable vertical antenna for 20 meters collapsible to 4 feet
Bi-Plane Antenna for 20 Meters
A Bi-Plane antenna for 20 meters, tuned it up, and put it on the air. Resultsd indicate that it is working pretty well for a 3-feet long dipole-type antenna at 22 feet up
C-POLE portable antenna for 20mt
Dimensions of C-Pole Antenna for 20m, frequency 14.240 MHz verall wire length roughly 1/2 wavelength, feedpoint 25% from end, lectrically an off center fed dipole
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The half square is made of a two strand computer ribbon cable 100 feet long, 47 feet of which is used for the balanced feed line
The HEX has a very small wingspan, but no loading coils or traps Therefore it does not have the losses associated with such devices It appears to perform much as a full size 2 element yagi, but with a better match to 50 Ohm coax, comparable gain and f/b, but with a bit less bandwidth Physically, it is very light and strong. It can be multibanded by nesting elements one inside the other, like a multi-band Quad
Here's an easily transportable vertical antenna for 20 meters collapsible to 4 feet
A Bi-Plane antenna for 20 meters, tuned it up, and put it on the air. Resultsd indicate that it is working pretty well for a 3-feet long dipole-type antenna at 22 feet up
Dimensions of C-Pole Antenna for 20m, frequency 14.240 MHz verall wire length roughly 1/2 wavelength, feedpoint 25% from end, lectrically an off center fed dipole
Take off angle of horizontal antenna For horizontal polarization, the electric field will move sideways on a horizontal plane, while for vertical polarization it will oscillate up and down on a vertical plane
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
Calculo da Antena Bazooka A double bazooka antenna is a combination that has a complete coaxial wave multiplied by its velocity factor and a total end-to-end length of 1/4 wave for each side affected by another driver shortening facto