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Randmon wire antennas
This is probably the oldest SWL antenna design. It is often called a long wire though a true long wire is cut to a specific frequency and is at least one wave length long at that frequency
post 21 Apr 2024
Antenna Shortwave Links →
Shortwave Antennas Loop
Here are some photos of the Shortwave Loop Antenna assembly to help you with putting it together
Skywire Loop Antenna
Below is a rough diagram and some photos of my skywire horizontal loop antenna. It is roughly 475 feet long and fed with 450-ohm ladder line
The Carpet Loop A High Performance Indoor SW Antenna
Active antennas are expensive, apt to generate as much noise as signal, and are prone to overload
Two Tube Doerle
This radio uses two #30 tubes and operates on batteries. It has shortwave coverage in two bands, 4.8 to 7.5 MHz and 7.3 to 12.0 MHz using plug in coils
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Here are some photos of the Shortwave Loop Antenna assembly to help you with putting it together
Below is a rough diagram and some photos of my skywire horizontal loop antenna. It is roughly 475 feet long and fed with 450-ohm ladder line
Active antennas are expensive, apt to generate as much noise as signal, and are prone to overload
This radio uses two #30 tubes and operates on batteries. It has shortwave coverage in two bands, 4.8 to 7.5 MHz and 7.3 to 12.0 MHz using plug in coils
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