  A previously introduced reduction of the Dirac equation is used to study the
Charmonium spectrum. A regularized vector potential that only depends on the
coupling constant and on the regularization radius is adopted, considering the
interacting quark as an extended source of the Chromo-electric field. A scalar
interaction is also introduced with some constraints for its parameters. A good
description of the structure of the Charmonium spectrum is obtained with only
three free parameters.
