Where, how do I get one? Is it included in a manual; where best to get that? Situation: Notorious faulty 1/4" plug into speakers >> high current draw to overcome resistance >> blown fuses >> kid in HSC electronics store sells me wrong fuses, right number wrong manufacturer >> I suspect the four output transistors are blown now, even with good speaker connections. I am a self-taught repairer. Uses 2 Motorola MJ15003 and 2 ..5004 , equiv. NTE 60 & 61 , where get them?