Hi Jim, sorry for the late reply but it has been a busy weekend. I work for Winovate and specialize in the servicing of ME Amplifiers and pre amplifiers.
Currently I am being pimped out to work for an associate, a former Winovate person, and due to Covid19 restrictions earlier this year and the passing of my Mother on the 18th of April, I have quite a backlog of work to do at Winovate. That said, I may still be able to guide you in checking the bias etc on your ME200.
Ron.