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Splitter Distribution of a HF signal on two receivers
Lately I needed a 3dB splitter for a HF 1-30MHz measurement project. Instead of buying me a splitter, I decided to build it on my own
post 30 Sep 2024
Antenna Duplex duplexer Links →
4-way Splitter/Combiner
The Spectrum-Analyser screen shows a frequency of 144.370 MHz were the marker is at that moment
6m duplexer construction
Construction of a set of WB5WPA style 6 meter notch duplexer
A triplexer for shortwave, 2 m and 70 cm
A triplexer for shortwave, 2 m and 70 cm I used CuAg wire for the coils, normal Cu wire should work too. The capacitors are 500 Volt types, you may order them here
A low cost UHF/VHF duplexer
Duplexers for dual band radio are usually high pass filter and low pass filter combined in the same box
Accoppiatori d'antenna-coupler antennas
Accoppiatore a cavo per due antenne d'impedenza singolo a 52 OHM
50
The Spectrum-Analyser screen shows a frequency of 144.370 MHz were the marker is at that moment
Construction of a set of WB5WPA style 6 meter notch duplexer
A triplexer for shortwave, 2 m and 70 cm I used CuAg wire for the coils, normal Cu wire should work too. The capacitors are 500 Volt types, you may order them here
Duplexers for dual band radio are usually high pass filter and low pass filter combined in the same box
Accoppiatore a cavo per due antenne d'impedenza singolo a 52 OHM
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