The experiments on ICRF heating in the Tokamak 'TUMAN-3' were carried out with one all-metal antenna located on the low field side of the torus. The antenna excited the wide K/sub /// spectrum (0-0.15 cm-1). The scenarios of experiments covered both the cases with a small fraction of hydrogen in a deuterium plasma, like in the experiments at the PLT Tokamak (Hosea et al., Proc. 12th ECCFPP, Budapest, vol.2, p.120, 1985), and the cases with a large amount of hydrogen, which are thoroughly investigated in TFR (TFR Group, Plasma Physics and Controlled Fusion Research, Vienna, IAEA, vol.2, p.17 1983).