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J-pole 145 mhz vhf antenna
Cut the 20mm pipe in two part: 150cm and 50cm; in the same way cut the 16mm pipe: 60cm and 20cm; join the pipes at the following way
post 29 May 2026
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J-pole 144
L'antenna cosi' realizzata risuona a circa 145 Mhz con un ROS di 1-1.1 e una larghezza di banda (ROS 1,5) di circa 8 MHz
J-Pole Antenna Plans
The J-Pole antenna is fundamentally an end-fed 1/2-wavelength antenna that uses a 1/4-wavelength long transformer section to supply the very high feed voltage
J-Pole Antenna
The connection point of the coax on the twinlead was found experimentally
J-Pole Antennas for 2 Meters
Two types of 2 meter J-Pole antennas, one made of copper pipe and a roll-up J-pole made of TV twin lead
78
L'antenna cosi' realizzata risuona a circa 145 Mhz con un ROS di 1-1.1 e una larghezza di banda (ROS 1,5) di circa 8 MHz
The J-Pole antenna is fundamentally an end-fed 1/2-wavelength antenna that uses a 1/4-wavelength long transformer section to supply the very high feed voltage
The connection point of the coax on the twinlead was found experimentally
Two types of 2 meter J-Pole antennas, one made of copper pipe and a roll-up J-pole made of TV twin lead
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