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Voltage Swing

Discussion in 'General Electronics' started by Lost'n Found, Sep 15, 2006.

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  1. Lost'n Found

    Lost'n Found Guest


    I am using PSPICE to simulate the output stage of a tube amplifier. I am
    using a 420v DC and an output transformer.

    The voltage on the plate of the tube swings between 840v and 420v. I know
    that the output transformer opposses the current change, but I thought that
    the voltage should swing up and below the 420v, not between 840v and 420v.

    Is it operating correctly? I mean can the voltage swing between VDC Max and
  2. Robert Baer

    Robert Baer Guest

    Insufficent information.
    *SOMETHING* is driving the xfmr to increase the plate voltage that
    you speak of.
    A single-ended class A tube driving a transformer primary with a
    matched load will (a) have a plate voltage swing equally above and below
    the supply voltage, and may have a problem saturating the transformer
    due to the DC current.
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