normal values of gm for a little-sign vacuum tube are 1 to 10 millisiemens. It is without doubt one of the three 'constants' of the vacuum tube, another two remaining its get μ and plate resistance Rp or Ra. The Van https://blog.globalgoodsguru.com/exploring-the-superiority-of-silicon-carbide-tubes-in-industrial-applications-fe95cea9bf5d