tube gain

tube gain

the overall electron gain of a photomultiplier tube, calculated as gn, where g is the dynode gain and n is the number of dynodes in the tube. Thus, if g is 3 and n is 8, the tube gain is 38, or 6561. See also dynode.
References in periodicals archive ?
Russian night vision devices frequently increase the tube gain far too high in order to achieve a brighter (but never clearer) image at the expense of tube life.
It features an adjustable internally projected recticle and interchangeable reticle pattern, manually adjustable image tube gain and reticle brightness, automatic gain control circuitry, and muzzle-flash protection reacting fast enough for the user still to see the impact of his shot.