from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a thermionic valve similar to a tetrode with the addition of a suppressor grid; was used in high quality audio and radio products

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a thermionic tube having five electrodes


Sorry, no etymologies found.


  • They had also miniaturized the beam pentode vacuum tube.

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  • Graphical Symbol in full simplified diode, indirectly heated duodiode, indirectly heated or triode, indirectly heated or duotriode with separated cathodes, indirectly heated, heating filament with central tapping, internal screening of the system tetrode pentode, suppressor grid connected with cathode triode - pentode triode - heptode (according to the circuit, the systems may be drawn left-and-right reversed) 1.10.

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  • Remember how he went to all the trouble of building a pentode vacuum tube for a job that could have been done by transistors he already had had a chance to get and didn't.

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  • In 1935 George and his father Costas built a one-valve transmitter using a type 59 pentode with suppressor grid modulation, and succeeded in contacting most of the world with this QRP rig.

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  • In the final amplifier stage Harry used a Telefunken pentode, the famous and very efficient RL12P35 which was used in the

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  • A basic ring-modulation function is also available in the unit -- applying a carrier pitch from an external oscillator to the screen grid of the pentode, this allows making inharmonic sum-and-difference pitch sound effects, with a unique vacuum tube pentode sound.


  • It uses a 12AF6 / BD6 remote-cutoff pentode and a 12AV7 dual triode.


  • I ish just a hobbyist~ very pleased with the performance .. running a high gain pentode in triode mode ish welli sweet sounding, almost minimal humming, will eliminate if i load in one or two more chokes but no space riaos~~ good current from transformer coupling .. bass control ish well good and tight~

  • In triode mode, of course, the screen grids of the KT88 pentode tubes are tied to the plates, and the tubes operate as indirectly heated triodes.

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  • But ask them to build a push-pull amplifier using pentode vacuum tubes and adjustable gain control and they wouldn't have clue one.



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