  In this work the experimental realization of a tunable high photon flux
extreme ultraviolet light source is presented. This is enabled by high harmonic
generation of two temporally delayed driving pulses, resulting in a tuning
range of 0.8 eV at the 19th harmonic at 22.8 eV. The implemented approach
allows for fast tuning of the spectrum, is highly flexible and is scalable
towards full spectral coverage at higher photon energies.
