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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
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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
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62
RF Inductance Calculator Mean diameter of the air core coil, measured from conductor centre to conductor centre include the wire insulation thickness, if any
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