On the nature of a 'typical' pulsars radio emission

The possibility of the excitation of electromagnetic (t) as well as of longitudinal-transverse (lt) waves in the magnetosphere of a 'typical' pulsar is discussed. Two mechanisms of the t-waves excitation excist. Th first mechanism is connected with the cyclotron resonance between t-waves and high-energy particles of the both: the 'tail' of the distribution function and the primary beam. Th second mechanism is conditiond by the particles drift motion and needs to safety a Cherenkov resonance condition. Due to the second mechamism the lt-waves excitation is olso possible. The waves excited due to the cyclotron instability cause the diffusion of particles across the magnetic field. For the sufficiently large pitch angles the aditional possibility of t-waves excitation appears. (author). 25 refs