I took it apart and resoldered the joints around the output transistor. It seemed to have helped the problem a little, but did not completely fix the problem. There seemed to be a lot of solder on the final transistor, more than what I would expect. I ended up just touching up the solder joints on the caps, especially on the collector. I've got photos if anyone is interested at the RepeaterBuilder Photos section called "R1225 PA module":
<http://groups.yahoo.com/group/Repeater-Builder/photos/album/591649868/pic/list> I didn't want to flow the solder too much for fear that it would spill out all over the board. There is a lot of solder on the final transistor area. 73, Joe, K1ike > > motarolla_doctor wrote: > >> PA M44GRC90C2AA is from the R1225 Repeater transciever chassis. They are 45 >> watts but overheat from lack of cooling. This should be the heatsink with >> the longer fins..perfered. >> Look for very poor crystalized solder joints due to overheating. >> >> > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > >
