Transitron Oscillator

transitron oscillator

[′tran·sə‚trän ′äs·ə‚lād·ər]
A negative-resistance oscillator in which the screen grid is more positive than the anode, and a capacitor is connected between the screen grid and the suppressor grid; the suppressor grid periodically divides the current between the screen grid and the anode, thereby producing oscillation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Transitron Oscillator


a device for the generation of electrical oscillations by means of a multigrid electron tube (for example, a pentode) that, when operating, has a negative trans-conductance between the screen grid and the cathode. A transitron oscillator is excited when the absolute value of the transcon-ductance is equal to or more than the alternating-current resistance of the oscillatory circuit connected to the screen grid and the cathode. The frequencies of the oscillations generated in a transitron oscillator may range from a few hertz to several hundred megahertz. Since it has high frequency stability, the transitron oscillator has been used mainly as a master oscillator in radio transmitters and as a local oscillator in superheterodyne radio receivers. By the 1970’s, the transitron oscillator was superseded by semiconductor oscillators.


Kublanovskii, la. S. Tranzitronnyi generator. Moscow-Leningrad, 1961.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.