"if you leave the power supply turned on and the production date is 1994 or later" so look for the last digit of the serial number greater than or equal to 4 http://www.n9vv.com/tt-sn-decoding.html 73, Barry N1EU __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! http://promotions.yahoo.com/new_mail