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List of vacuum tubes
open-in-new
<p> This is a list of <a href="/facts/Vacuum_tube/VHd1BNLq">vacuum tubes</a> or <i>thermionic valves</i>, and low-pressure <a href="/facts/Gas-filled_tube/uPNhhy7I">gas-filled tubes</a>, or <i>discharge tubes</i>. Before the advent of <a href="/facts/Semiconductor/zFf3mGTE">semiconductor</a> devices, thousands of tube types were used in consumer electronics. Many industrial, military or otherwise professional tubes were also produced. Only a few types are still used today, mainly in high-power, high-frequency applications and also in boutique guitar amplifiers. </p>