Consultation des notices

This paper deals with measurements of vacuum tubes to improve models and guitar amplifier simulations. A measurement device has been created. A first experiment is dedicated to study the static regimes of real dual triodes 12AX7s. A second one is used to study the dynamic regimes mainly involved by parasitic capacitances. By using these measurements, a new static triode model is proposed. it includes : refinements of the Norman Koren’s plate current model; associated parameters estimation procedure; grid current modeling, dependent on both plate-to-cathode and grid-to-cathode voltages around triodes. The parameters of the static model are estimated for each real triode measured, as well as the ”so-called” Miller capacitance. It is available as a SPICE model.