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A simple broadband 4:1 Balun Transformer
10 bifilar turns are mount on an Amidon FT-240-61 ferrite core
post 16 May 2024
Toroid & balun Links →
Balun 1:64 for end fed, PD7MAA
Build a legal limit current balun for 160 - 10 metersWind two FT240-61 ferrite core
Misure di una ferrite sconosciuta, IW2FND
In practice, just wind a coil around the core of the ferrite and measure the inductance
Creating a balun, G0KSC
For 50Ohm direct feed antennas, just a 1:1 balanced to unbalance transformer is needed
Balun di tensione 1:32
Toroid FT140 / 43 0.9 enamelled wire for primary winding
Circuito balanceado a um circuito desbalanceado, PY4ZBZ
Examples of BALUN made with coaxial cable stubs
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Build a legal limit current balun for 160 - 10 metersWind two FT240-61 ferrite core
In practice, just wind a coil around the core of the ferrite and measure the inductance
For 50Ohm direct feed antennas, just a 1:1 balanced to unbalance transformer is needed
Toroid FT140 / 43 0.9 enamelled wire for primary winding
Examples of BALUN made with coaxial cable stubs
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