The 3/2 power scaling symmetry is explicitly demonstrated to govern triode vacuum tube operation at negative grid bias. A simple model is suggested as a triode replacement for the Child diode law. Its accuracy is checked for 12AU7, 12AX7, and 6SN7 triode tubes.

Author: Kashuba, Alexander
Affiliation: Landau Institute for Theoretical Physics, Moscow, Russia
JAES Volume 47 Issue 5 pp. 373-377; May 1999
Publication Date: May 1, 1999

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