Simulation of vacuum tubes is now a necessary technique in the design of a modern tube amplifier. This paper describes the design of simulation models that are as complete as possible in terms of reproduction of the Ip/Vp and screen grid : curves, however, the precision of simulation is very high. The distortion, for instance, which is a good indicator of precision, shows a close correspondence with the measurements, and the polarization is very precise. A complete library, including about 40 different tubes, has been created with which it should be possible to successfully apply the concept of virtual modeling to high-fidelity or RF amplifiers and to historical research into the beginning of radio communications.
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