Relaxation effects are studied in the steady-state proton-proton double resonance spectra of a symmetrical three spin system of the type AB2, formed by the ring protons of 2,6-dibromoaniline. The experiments were performed on a Varian HR-100 high resolution N.M.R. spectrometer suitably modified for field-frequency locking and added by the usual equipment for the purpose of frequency-sweep double resonance. The sample used is a 20 per cent solution in CCl4, purified and sealed in vacuum. The parameters describing the single resonance spectrum of the molecule were obtained to be