Transfo interétage vs condensateur de liaison
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RE: Transfo interétage vs condensateur de liaison
Yves a écrit :Euh ? ? Peux tu préciser ?
Lire dans ce topo d'Andy Grove à partir de "One disadvantage of the bifilar transformer is that the input must be in phase with the output".

"One disadvantage of the bifilar transformer is that the input must be in phase with the output, this is due to the relatively large capacitance which exists between the two closely spaced wires of the primary and secondary, when the input and output are in phase then this capacitance actually forms part of the coupling. If the phase of the output were reversed compared to the input, in other words if you were to use the transformer as a phase inverter, then the magnetic coupling would be fighting against the capacitance of between the wires and the capacitance gets reflected across the primary and secondary. This shunt capacitance will severely limit the high frequency response of the stage. When using bifilar transformers in very low impedance circuits it is possible to alter the phase of one winding compared to the other, the magnetic coupling beats the capacitive, however we're not talking about “normal�? valve impedances."
@mitiés, Dominique,
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RE: Transfo interétage vs condensateur de liaison - par Dominique - 06/08/2014-08:28:06

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