  We present new BeppoSAX LECS, MECS, and PDS observations of five
lobe-dominated, broad-line active galactic nuclei selected from the 2 Jy sample
of southern radio sources. These include three radio quasars and two broad-line
radio galaxies. ROSAT PSPC data, available for all the objects, are also used
to better constrain the spectral shape in the soft X-ray band. The collected
data cover the 0.1 - 10 keV energy range, reaching 40 keV for one source.
Detailed spectral fitting shows that all sources have a flat hard X-ray
spectrum with energy index alpha_x ~ 0.75 in the 2 - 10 keV energy range. This
is a new result, which is at variance with the situation at lower energies
where these sources exhibit steeper spectra. Spectral breaks ~0.5 at 1 - 2 keV
characterize the overall X-ray spectra of our objects. The flat, high-energy
slope is very similar to that displayed by flat-spectrum/core-dominated
quasars, which suggests that the same emission mechanism (most likely inverse
Compton) produces the hard X-ray spectra in both classes. Contrary to the
optical evidence for some of our sources, no absorption above the Galactic
value is found in our sample. Finally, a (weak) thermal component is also
present at low energies in the two broad-line radio galaxies included in our
study.
