A ruby-laser-pumped dye laser having a linewidth of 1.8 nm has been developed as a source of tunable high-output-power radiation covering the wavelength range 720-900 nm. With Brewster-angled prisms employed as a low-insertion-loss tuning element, output powers of between 5 and 24 MW were obtained for an input pumping power of up to 65 MW in a number of cynanine dyes. Conversion efficiencies of up to 40% were obtained with these dyes dissolved in ethylene glycol, which in general gave an improved performance compared with acetone solutions.