I blew 5 power trannies on my Sophia 845's. Tech could find nothing wrong with the units. I got sick of paying $400usd for one trannie so I subbed in separate Hammond high tension and 5 volt filament trannies(put in the same one in the original) and have not had the same problem since. Best thing is that the 4 Hammond trannies only cost me $250cad which is about $160usd these days. The hammonds were far heavier as well.
