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Vertical antenna Slim Jim
The slim jim has more bandwidth or a wider range of frequencies than the jpole
post 06 Dec 2024
Antenna jpole Links →
Antenna Theory
Another approach to the problem is the "J-Pole" antenna. In this design, the antenna is elevated at least 1/4 wavelength above ground, thus eliminating the ground losses and "normalizing" the radiation pattern. The Impedance matching between the low impedance feed line and the high impedance of the end of the dipole
J-pole antenna costruzione
Calcolatore per antenna j-pole
J-Pole antenna
Jpole with standard 300 ohm twin lead tv cable
J-Pole Construction Drawings
Antenna j-pole Bibanda vhf - uhf
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Another approach to the problem is the "J-Pole" antenna. In this design, the antenna is elevated at least 1/4 wavelength above ground, thus eliminating the ground losses and "normalizing" the radiation pattern. The Impedance matching between the low impedance feed line and the high impedance of the end of the dipole
Calcolatore per antenna j-pole
Jpole with standard 300 ohm twin lead tv cable
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62