A new series of rotamak experiments conducted in a 10-litre spherical pyrex discharge vessel are described. This series of experiments uses a two-channel RF system (0.5 MHz, 40 ms pulse duration, 116 kW/channel) capable of operating at much higher power levels than have previously been available. The properties of the rotamak discharge as a circuit element are presented together with detailed measurements of the plasma/field configuration. Steady toroidal currents of up to 7 kA have been driven with an RF power input of 180 kW. Electron densities and temperatures of up to 6*1019 m-3 and 11 eV have been obtained. A substantial fraction of the driven current has been tentatively identified as bootstrap current driven by the dynamo action of the radial plasma transport across the poloidal magnetic field.