The Injun III passes over the auroral zone stations of College ( L=5.5) and Fort Yukon ( L=6.3), Alaska, during January 1963–October 1963, are utilized for a comparison of fluxes of precipitating and ‘trapped’ electrons with the instantaneous values of broad beam radio absorption at 27.6 Mc/s. The flux of precipitating electrons of energy E>40 keV revealed clear control on the absorption magnitude. For a given precipitating flux of electrons of energy E>40 keV, with pitch angles 0–43° over the zone, the magnitude of absorption increased with the increasing availability of the flux with pitch angles >43°. The trapped flux over the zone was, typically, ten to a hundred fold stronger than the precipitating flux, with only the instances of severe precipitation tending to be isotropic. The ‘trapped’ flux as such ( E>40 keV) was poorly related to the magnitude of absorption; while the trapped flux, E>250 keV, E>1.5 MeV were found unrelated to the magnitude of absorption. The empirical relationship between the precipitating flux (cm −2sec −1ster −1) of E>40 keV and the magnitude of broadbeam absorption at 30 Mc/s could be expressed as A( db)=3.3×10 −3 N>40 keV during the instances when the precipitation was more or less isotropic from the upper hemisphere. The empirical dependence of absorption is found to be approximately consistent with the calculated dependence of absorption, by estimating the electron density profile due to a primary electron spectrum of the form N( E)= KE −4.5(cm −2sec −1ster −1keV −1).