****************************************************** PR # 43012 We propose to observe a sample of cataclysmic variables with weak magnetic fields in order to determine their detailed X-ray spectra and thus to test the validity of standard models, developed on the basis of low spectral resolution observations of a very few bright CVs. Recent observations of other weak-field CVs demonstrate the weakness of present models and make it unclear whether the properties of the brightest systems are typical of the whole class. Our understanding of weak-field CVs ca ******************************************************