I was supplied the answer to my question above and now realize I have no idea on how to bias this amp? If anyone has an owner's manual for the AU70 or AU30 and could email or mail me a copy, I would be most appreciative. I searched all over the net and found nothing. Thanks.
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Roger Hug is the man that works on all Wright Sound gear and he may have a manual and can certainly repair. Here is his email. He will not have schematic. He is an expert on tube gear.