components

Resistors, Variable Volume controls, also called potentiometers are variable resistors that come in a variety of sizes, but usually do the same thing—control the amount of audio circuitry amplification. Wiper (Blue) Resistive coating (Blue) . […]

Capacitors, Variable Schematic symbols. Variable capacitors are used to tune your radio, and sometimes to fine-tune RF circuits and the accuracy of the frequency dial indicators. They consist of a set of non-movable, or static […]

Transistors Transistors come in many shapes, sizes, and colors. Radios can have as few as one, or as many as fourteen or more. Surprisingly, the transistor count is not always a reliable indicator of performance. […]

Resistors, Fixed Typical fixed resistors. Fixed resistors frustrate the flow of electrons, and are used to control voltages and current flow in virtually every radio circuit. The photo  shows typical examples found in old transistor […]

Soldering Proper soldering and unsoldering are key skills if you plan to make electronic repairs. Here’s how it’s done. The process is both easy to learn, and fun. Do remember to work safely. Tips and […]