Wrt distortion, unbiased transformers create odd order harmonics due to the bh loop symmetry around the origin.
Tubes like solid state devices are nonlinear in an asymmetrical manner so they create predominantly even order distortions.
In order to get transformers to create even order distortion the core must be offset from the origi
n which is typically done by a dc bias.
In order to get nonliner devices to create predominantly odd order distortions, they must be made parallel and summed with one signal inverted. (pushpull, balanced,differential)
Dave
Tubes like solid state devices are nonlinear in an asymmetrical manner so they create predominantly even order distortions.
In order to get transformers to create even order distortion the core must be offset from the origi
n which is typically done by a dc bias.
In order to get nonliner devices to create predominantly odd order distortions, they must be made parallel and summed with one signal inverted. (pushpull, balanced,differential)
Dave