px vertical
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Antennas : 40M : 40 meter Vertical Antennas
- 40m Vertical End-Fed Antenna
- A quarter wave vertical end-fed antenna for the 40 meters band. As all vertical antennas, also this aerial requires a good earthing system. In this project the ground is composed by twelve 4, wires buried in the lawn by using a spade to create a slit to drop the wire into.
[ Hits: 2688 | Votes: 7 | Rating: 5.43 ]
- Vertical Antenna Calculator
- Use this online calculator to determine the length of a quarter-wave antenna from the frequency. Both metric and English units of measurement are supported.
[ Hits: 915 | Votes: 8 | Rating: 6.99 ]
- Coil-Shortened Vertical Antenna Calculator
- You can shorten a vertical antenna by using a loading coil. This online calculator tells you how the amout of inductance your loading coil will need to have.
[ Hits: 309 | Votes: 2 | Rating: 5.5 ]
- TEFV Terminated End Fed Vee Antenna
- The Terminated End Fed Vee Antenna (TEFV) is a travelling wave antenna with constant current distribution. Unlike traditional resonant antennas, TEFV operates without standing waves, using a terminating resistor for broadband efficiency. With a combination of vertical and horizontal polarization, it offers wide bandwidth from 1.8 MHz to 30 MHz, eliminating the need for a tuner. Key components include a 9:1 unun transformer and a 500-ohm terminating resistor. Grounding and counterpoise enhance performance, and it can handle power losses of up to 30%. TEFV provides an effective, versatile antenna solution for amateur radio and broadcast applications.
[ Hits: 183 | Votes: 2 | Rating: 6.5 ]
- Phased Arrays
- Phased arrays of short vertical antennas. A technical notes from Butternut antennas on phased vertical arrays
[ Hits: 4730 | Votes: 9 | Rating: 6.25 ]
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