pentode
/ˈpɛntoʊd/
noun
- A type of electronic vacuum tube that has five electrodes inside, used to amplify signals in older radios, amplifiers, and other electronic devices.
- The technician replaced the damaged pentode in the vintage amplifier to restore its sound.
- In electronics class, we learned how a pentode can provide more amplification than a simpler triode.
- The old radio used a pentode to boost the weak signal from the antenna.