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We present interferometric observations of 7 main-sequence and 3 giant starswith spectral types from B2 to F6 using the PAVO beam combiner at the CHARAarray. We have directly determined the angular diameters for these objects withan average precision of 2.3%. We have also computed bolometric fluxes usingavailable photometry in the visible and infrared wavelengths, as well asspace-based ultraviolet spectroscopy. Combined with precise \textit{Hipparcos}parallaxes, we have derived a set of fundamental stellar properties includinglinear radius, luminosity and effective temperature. Fitting the latter tocomputed isochrone models, we have inferred masses and ages of the stars. Theeffective temperatures obtained are in good agreement (at a 3% level) withnearly-independent temperature estimations from spectroscopy. They validaterecent sixth-order polynomial (B-V)-$T_\mathrm{eff}$ empirical relations\citep{Boyajian2012a}, but suggest that a more conservative third-ordersolution \citep{vanBelle2009} could adequately describe the(V-K)-$T_\mathrm{eff}$ relation for main-sequence stars of spectral type A0 andlater. Finally, we have compared mass values obtained combining surface gravitywith inferred stellar radius (\textit{gravity mass}) and as a result of thecomparison of computed luminosity and temperature values with stellarevolutionary models (\textit{isochrone mass}). The strong discrepancy betweenisochrone and gravity mass obtained for one of the observed stars,$\gamma$\,Lyr, suggests that determination of the stellar atmosphere parametersshould be revised.

Optical Interferometry of early-type stars with PAVO@CHARA. I. Fundamental stellar properties