transformer output amplitude increasing oscillations

An electrical circuit I have been building is giving me strance oscillations just downstream of the transformer. The circut and waveforms are attached http://imageshack.us/photo/my-images/835/cktc.jpg/ I read that u need to add a parasitic resistive or capacitive element. It didn't seem to work doing it......how do i resolve this...thanx

Answer 1

[Joel Van Sickel]

In addition to adding snubber resistors, you can reduce your time step or increase your tolerance. Maksure sure you are using the correct solver (23tb) as well. If it still exists, the model may be simulating accurately, and more parasitics and losses need to be modelled.