7Z5OO and PJ5AA were operated by Dr. Mike Manafo, K3UOC.
7Z5OO operations took place between 11-Oct-94 and 31-May-98.
PJ5AA operations took place in Apr-96, Jan-97, and Jan-98.
QSL is via:
W1AF
The Harvard Wireless Club
6 Linden St.
Cambridge, MA 02138 USA