ARRL code practice sessions on station W1AW:

1.818, 3.58, 7.08, 14.07, 21.08, 28.08, 50.08, 147.555 Mhz

slow speed (E. coast as of 1989) @ 9am & 7pm, Mon., Wed., Thurs.
                                   4pm & 10pm Tues., Thurs., Sat., Sun.

See QST Magazine for latest times & freq.'s