L-band total and core monochromatic radio powers of high redshift radio sources. The sources presented in this paper are marked with triangles. Top: The comparison of L-band core monochromatic radio power and the L-band total monochromatic radio power for z > 5 sources where both values are available. The dashed line represents the P_total = P_core. The colours indicate the source radio loudness. Middle: The total (left) and core (right) monochromatic radio powers of z > 5 sources as a function of radio loudness. Bottom: The total (left) and core (right) monochromatic radio powers as a function of redshift.