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Hi Guys Is it worthwhile, while I've got the Fedelio (102DD) in my mitts, to trace the circuit out? I'm tempted to do that for my own purpose, but external interest will motivate me even more! I particularly want to re-design the PCB using ceramic valve bases instead of the round support rings...

Hi All I've got a Fidelio (102DD) to repair for a friend. It was making popping sounds on L channel and one valve was as good as a microphone, it was so microphonic! However, a matched pair of 6n45C's from Sanita later, its purring like a kitten again. It would be handy to have the diagram...