A cyclotron and Cherenkov resonance emission mechanism is discussed as
an explanation of the properties of the radio emission of the pulsar
PSR 1822-09, This mechanism can describe the structure of the main pul
se and the presence of interpulses in the framework of a coaxial rotat
or model. Mode switching in PSR 1822-09 and similar objects may be due
to restructuring of the electron distribution functions in the primar
y beam and secondary plasma.