+The 6c4 is a miniature [triode](/wiki/Triode) [vacuum tube](/wiki/Vacuum_Tube), a small glass bottle once vital in electronic circuits. Esteemed for its reliable performance, it often served as an amplifier or oscillator in compact designs.
+## See also
+- [Electronics](/wiki/Electronics)
+- [Valve](/wiki/Valve)
+- [Circuit](/wiki/Circuit)
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