Finally found out what a YU-116 is. It is a 8877 with out fins for pulse cavity amplifier applications. I guess that they were not used much. 73 Bill -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.contesting.com/km9p/search.htm