For those who enjoy building radio projects, you may have noticed that variable capacitors are not as available as they once were. There was a time when all radio receivers contained at least one, but ...

The inside of classic radios holds wonders that the sterile chips and SMD components of today’s circuits can’t hold a candle to. Chunky resistors and capacitors, vacuum tubes with cathodes aglow, and ...

The size of a capacitor affects how much charge it can store (its capacitance), its voltage rating, and its physical ...

The inside of classic radios holds wonders that the sterile chips and SMD components of today’s circuits can’t hold a candle to. Chunky resistors and capacitors, vacuum tubes with cathodes aglow, and ...

A large capacitor is charged by a 6 V battery or a 15 V DC power supply. When a copper rod is shorted across the terminals of the capacitor, a large spark is produced. The spark is obviously more ...