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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 Jan 2024
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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
80
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
Antenna splitter per VHF-UHF per quattro ricevitori Chi dispone di una sola antenna e vuole collegarvi più di un ricevitore necessità di uno splitter
Amateur radio kits by Kanga US
50MHz to 28MHz RX Converter The concept of the rx converter is quite simple and nothing really new. the local oscillator is a standard colpitts crystal oscillator producing the 22mhz lo signal