This transmitter is basic but allows transmission of audio to an AM radio. It consists of an RF oscillator operating in the AM broadcast band, together with a modulator stage, which mixes the incoming ...

The chances are that many of you will have made an FM “bug” style transmitter, a simple one-transistor oscillator usually driven by a small electret microphone. It’s also relatively straightforward to ...

When Northwestern College Radio acquired WMAD, Sun Prairie, WI, in January 1997, one of the first priorities was to replace the transmitter, a 1981-vintage unit from a defunct manufacturer. The ...

The new breeds of IBOC transmitters on the floor at the NAB2004 convention in Las Vegas weren’t that big – and they’re anything but generic. Implementation choices for FM IBOC range from low-level ...

AM radios are relatively simple devices, and building one is a good way to start exploring the world of radio communications. [GreatScott] does exactly this in the video after the break, building both ...