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Duplexer 144-432 MHz
L1-L2-L3-L4 =2sp.Cu 1mm D = 6mm Spaziale L5 = 4Sp Cu 1mm D = D=6mm.Spaziale
post 04 Apr 2024
Antenna Duplex duplexer Links →
Duplexer 144-432 MHz
This self-constructing duplexer can be operated in just a few minutes with two 144/435 antennas
4-way Splitter/Combiner
Power splitters are used to combine 2 or more antennas on 1 feedline
HF VHF receiver diplexer
The design is relatively easy, a back to back low pass-high pass filer system with a 50 ohm impedance throughout
Stacking with homemade Power Splitters
The basis of the power splitters-combiners is a construction of a square tube for the outer conductor and a round tube for the inner conductor
Triplexer HF/50 Mhz 144 432 Mhz
To get signals from all directions, without having to constantly rotate the directional antennas
Duplexer 144 - 430 MHz
Low-pass filter 144 MHz and a high-pass filter 430 MHz of higher order
50
This self-constructing duplexer can be operated in just a few minutes with two 144/435 antennas
Power splitters are used to combine 2 or more antennas on 1 feedline
The design is relatively easy, a back to back low pass-high pass filer system with a 50 ohm impedance throughout
The basis of the power splitters-combiners is a construction of a square tube for the outer conductor and a round tube for the inner conductor
To get signals from all directions, without having to constantly rotate the directional antennas
Low-pass filter 144 MHz and a high-pass filter 430 MHz of higher order
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
Voice Recorder Gestito dall'integrato in questione ed offre la possibilità di registrare più messaggi per una durata massima di un minuto con buona fedeltà di riproduzione