Ground-based multichannel photometry of integral sunlight has been obtained at Izaña (Tenerife) during three months in 1984 with a photometer built at ESTEC. Power spectra of solar irradiance variations of individual days show power in the 5 min band just above noise at a level comparable to the one found from the SMM data (Woodard and Hudson, 1983). Previous similar ground work had never achieved the signal level required at the 5 min interval. When combining the best 7 contiguous days of data, the signature of p mode solar oscillations spectra appears, but individual identification is difficult due to a low signal-to-noise ratio.