This project implements a VFO and BFO using an Arduino with Si5351 signal generator. You can controll the VFO using an encoder and also a SmartPhone via a mobile application developed here for this ...

Arduino Nano sketch for for Si5351 VFO and Bob Fontana AK3Y's Tuna Tin S QRPp CW Transmitter This Arduino Nano Si5351 VFO code designed for the Tuna Tin S, a low power amateur radio radiotelegraphy ...

今回製作しているQP-7C FT8、私が下記のデジタルVFOを製作した時、こういうことをやりたかった、というのが、具現化されておりました。 大陸からようやく替えのAD9850基板が届きデジタルVFO完成しました！受信側の周波数固定して送信側の周波数を変えると ...

remove-circle Internet Archive's in-browser video "theater" requires JavaScript to be enabled. It appears your browser does not have it turned on. Please see your ...

remove-circle Internet Archive's in-browser video "theater" requires JavaScript to be enabled. It appears your browser does not have it turned on. Please see your ...

At the heart of many amateur radio and other projects lies the VFO, or Variable Frequency Oscillator. Decades ago this would have been a free-running LC tuned circuit, then as technology advanced it ...