Abstract. We present radio maps of ten large-diameter supernova remnants observed at 35 cm wavelength with the Effelsberg 100-m telescope. The angular resolution is 14. 5. The sources are G126.2+1.6, G127.1+0.5, HB3, HB9, S147, IC 443, Cygnus Loop, W63 and HB21. For each object we give an integrated flux density and improved spectra when necessary. We also present a map of G213.0−0.6, which we tentatively identify as a new large supernova remnant with a very low surface brightness, apparently interacting with the H  region S284.