A description is given of a probe which is designed for nuclear magnetic resonance (NMR) experiments at 180 MHz on samples at hydrostatic pressure up to 10 kbar. Temperature control has been designed to allow experiments from room temperature up to 600 K, regulated with an accuracy of 0.1 K. Radio frequency feedthroughs can sustain high-voltage pulses of considerable length. The probe has been used successfully in a proton spin relaxation study at 180 MHz of polyethylene near the melting line.