NULL TETRAD FORMULATION OF NON-ABELIAN DYONS

Starting with a brief description of dyons and gravito-dyons, combined field equations and the equation of motion for generalized electromag netic and generalized gravito-Heavisidian fields are derived in a mani festly covariant way. A non-Abelian gauge theory of dyons and gravito- dyons is described in terms of a generalized Yang-Mills potential, fie ld strengths, and generalized field equations each carrying electric a nd magnetic constituents. A null tetrad formulation of a generalized Y ang-Mills potential and field strength of dyons is discussed in detail in terms of symmetric spinors and spin coefficients. Generalized Yang -Mills field equations of dyons are rewritten in terms of null tetrad notation, and dyon solutions of source-free Dirac equations are obtain ed.