Raymond Collins wrote:

Working on an old Advent 300,(FM and 15 watt amp) found a shot MPSU02.
Apparently the same as a MPSU06 and U05 and NTE188. NTE 188 no
longer made will the NTE 190 do the job?

Yes, it will do. Or you can use a BD139 (NTE373), not exactly the
same, but easier to find.
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Ing. Remberto Gomez-Meda
http://ingemeda.tripod.com/
INGE - Ingenieria Electronica.
Puerto Vallarta, Jalisco, Mexico.