Circuit Components - 004

Every radio is built from a handful of basic circuit components that work together to control, shape, and move electrical signals. These parts may look simple on their own, but when combined, they create the amplifiers, receivers, and transmitters that make communication possible.

In this section, you’ll explore the key components used in amateur radio: resistors, capacitors, diodes, transistors, field-effect transistors, amplifiers, and vacuum tubes. By learning how each one functions and why it matters, you’ll gain the foundation to understand schematics, troubleshoot equipment, and see how simple parts form the complex systems at the heart of radio.