The spectra of the (X) over tilde (2)A'-(A) over tilde (2)A" electronic transition of jet-cooled vinyl radical, C2H3, and its partially deuterated isotopomer, CD2CH, have been obtained via action spectroscopy. The appearance of the H or D fragment was monitored via 1+1' resonance enhanced multiphoton ionization through the Lyman-alpha transition. The vibrational structure of the (A) over tilde (2)A" state was fully resolved and analyzed. The experimental vibrational frequencies agree well with ab initio calculations. The simulation of the rotational structure of several bands reinforces vibrational assignments.