This work is an addition to a previous AES preprint (4643), where a new generalized push-pull tube amplifiertopology was introduced, allowing an easy evaluation of maximum output power, optimal primary impedance ofthe output transformer and the damping factor, by a direct simulation of equations on a computer. But directsimulation is not always the right tool to use when accurate information’s have to be derived at small inputsignal. Then the appropriate tool is a systematic use of Taylor's expansions. The aim of this paper is to showhow to determine these expansions and which new results and insights can be derived from them, like newstability criteria, output impedance variations, harmonic distortions and effective voltage gains.
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