Depending on what you're looking for, you might also be referring to:
Modern radios are almost exclusively solid-state because this technology offers several critical advantages over vacuum tubes: The radio
: Transistors are tiny compared to bulky valves, allowing for the portable "transistor radios" that changed how we listen to music. Depending on what you're looking for, you might
: The physical ability of radio waves to pass through "solid" objects like walls or ice, which depends heavily on the frequency of the signal. Depending on what you're looking for
In the world of radio, the most significant "solid" feature is . This refers to radios that use semiconductor devices—like transistors and integrated circuits—instead of old-fashioned vacuum tubes (valves). Key Benefits of Solid-State Radio