Hello.

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
higher?