0000950123-01-508738 424B3 1 20011121 CALPINE CORP 0000916457 4911 770212977 DE 1231 424B3 33 333-66078 1798037 50 WEST SAN FERNANDO ST SAN JOSE CA 95113 4089955115 50 W SAN FERNANDO SUITE 500 SAN JOSE CA 95113 424B3 1 f74069bbe424b3.txt PROSPECTUS SUPPLEMENT