A study of spectral characteristics of the RC-catalogue and preliminary optical identifications.

Spectral analyses of the RC-catalog of the experiment "Cold" containing 840 radiosources in the interval of right ascension 4 - 22^h are made. 280 spectra of radiosources are presented, 215 spectra are new. The mean spectral index for 196 objects with steep spectra (α ≥ 0.5) and flux densities >12 mJn is α¯ = 0.87±0.01. A preliminary optical identification of radiosources with catalogued galaxies is made. The catalog, similar to Kurch's catalog, for the experiment "Cold" strip is compiled.