Another great crystal oscillator circuit with BB139, a 2-nd harmonic quartz crystal and one BF214 transistor. So, the Q quartz is half of the desired transmitter frequency, L1 has 24 turns, 0.08mm Ø ...

If you own a radio transmitter, from a $10 Baofeng handheld to a $1000 fancy all-band transceiver, setting the frequency is simply a case of dialing in where you want to go. A phase-locked-loop ...

The “Secret Dream” Transmitter project is a continuous wave or CW transmitter assembled with vintage components. It make use of two 807 power amplifier and a 6AG7 metal tube for its electron-coupled ...

To ensure the authenticity of the Galileo navigation messages, the Open Service navigation message authentication (OSNMA) mechanism requires a loose synchronization between the receiver clock and the ...

What’s the minimal BOM for a working amateur radio transmitter? Looks like you can get away with seven parts, or eight if you include the walnut. You’ve got to have a walnut. Some hams really love the ...