0001095811-01-501071 PRE 14A 1 20010517 20010409 CALPINE CORP 0000916457 4911 770212977 DE 1231 PRE 14A 34 001-12079 1598421 50 WEST SAN FERNANDO ST SAN JOSE CA 95113 4089955115 50 W SAN FERNANDO SUITE 500 SAN JOSE CA 95113 PRE 14A 1 f71436prpre14a.txt PRE NOTICE AND PROXY