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Antenna HALO Per i 70 MHz
Alimentazione mediante il sistema denominato gamma-match con il condensatore realizzato inserendo il centrale del rg58 completo di isolatore all’interno del tubo di alluminio costituente il gamma-match
post 19 Sep 2024
Antenna for UHF VHF Links →
Quadrifilar helicoidal antenna - Photos
Detailed view of the balun J-J used RG-400, too rigid to bend and pass through the tubing
Quadrifilar Antenna to receive 137 MGHz
Creation of a four-wire antenna to receive the 137 MHz signal from NOAA meteorological satellites
Swiss quad for 144Mhz
This antenna can be made for 50 or 28 MHz. The length of the elements is given at the bottom of the description
The 2 Element HB9CV Beam
The Beam is a coax-fed version of the ZL-Special. The reflector is fed 225 out of phase
The 2m/70cm yagi Project
3 elements on 2 meters and 4 elements on 70 centimeters
155
Detailed view of the balun J-J used RG-400, too rigid to bend and pass through the tubing
Creation of a four-wire antenna to receive the 137 MHz signal from NOAA meteorological satellites
This antenna can be made for 50 or 28 MHz. The length of the elements is given at the bottom of the description
The Beam is a coax-fed version of the ZL-Special. The reflector is fed 225 out of phase
3 elements on 2 meters and 4 elements on 70 centimeters
Ferrite Shop Ferrite-shop on-line shop, cable clamps,toroids, cable cores, technic,ferrite material choice
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