  We present the results of a detailed analysis of the newly discovered 15
arcmin large FRII-type radio galaxy WNB 0313+683. It has a redshift of 0.0901
+/- 0.0002 and a projected linear size of 2.0 Mpc. Using multi-frequency radio
data from the WENSS and NVSS surveys, the VLA, the WSRT and the 100m Effelsberg
telescope, we have derived the age of the source (1.4 +/- 0.1 x 10^8 yrs) and
the particle densities around the two radio lobes (>1.6 x 10^(-6) per cubic cm
for the southern lobe and >5.8 x 10^(-7) per cubic cm for the northern). From
optical spectroscopy we find that the H$\alpha$ emission line has a broad
component, and that the extinction is large (with colour index E(B-V) = 0.98
+/- 0.10 mag), but is probably mostly galactic in origin (b= +9.8 degrees).
Further, the radio core has an inverted spectrum with a spectral index of +0.42
+/- 0.03, suggesting a very compact structure. At 10.5 GHz, it contributes 25%
of the total flux density of the source, which is extremely high for radio
galaxies. WNB 0313+683 has a very large optical emission line flux with respect
to its estimated jet power, when compared with the correlation between these
two properties found by Rawlings & Saunders (1991). We argue that this,
together with the relatively high radio power and the inverted radio spectrum
of the radio core, is suggestive of a new phase of radio activity in this
source.
