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normal values of gm for a little-sign vacuum tube are one to 10 millisiemens. It is probably the a few 'constants' of a vacuum tube, the opposite two becoming its attain μ and plate resistance Rp or Ra. The Van der Bijl equation defines their partnership as follows: g m = μ R p \displaystyle g_ m = \mu \over R_ p as a way to attain really restr