Because the modulation transformer is inserted between the HV supply and the tube plate, the amplitude of the RF carrier will vary with the audio signal, completing the amplitude modulation.

You’ll also have to learn Morse code because the minimalist build only supports continuous-wave (CW) mode, although it can be modified for amplitude modulation (AM) voice work. The circuit is ...

But for a weekend project, [Vinod.S] took the ultrasonic transmitter and receiver from a distance-meter module and used amplitude modulation to send music ultrasonically from his laptop to a ...

Anyway, my though was that a couple of extra emitter followers at the front end (circuit left), with variable dc voltages on their bases (5-10k potentiometers in drawing), could emitter-switch the ...

Scientists have successfully demonstrated a microwave signal mixer made from a tunnel-junction transistor laser. Development of the device brings researchers a big step closer to higher speed ...