My 5286 finally got done today. Replaced all the electrolytics and one channel was still weak. Traced it down to Q110, a HIT9014C6. Found a SS9014C at Digikey which is a is a perfect match in case anyone ever runs across this sub need, hFE is spot on. Note, the collector and base need to be crossed to match the original configuration. The original when viewing the flat side front is E-C-B and the sub is E-B C.