  In order to study the nature of the far-infrared emission observed in
radio-loud active galaxies, we have obtained 1.2 mm observations with the IRAM
30 m telescope for a sample of eight radio-loud active galaxies. In all objects
we find that the 1.2 mm emission is dominated by non-thermal emission. An
extrapolation of the non-thermal radio spectrum indicates that the contribution
of synchrotron emission to the far-infrared is less than 10% in quasars, and
negligible in the radio galaxies. The quasars in the sample show signs of
relativistic beaming at millimeter wavelengths, and the quasar 3C334 shows
evidence for strong variability.
