Hi All, Concerning the current thread about the above subject, Craig
Brougher has written another insightful article about the Duo-Art
Reproducing System and "leakage".
In the article, "The Weakly-Playing Duo-Art", he explains the logic
that Aeolian employed in their design of the stack and the vacuum pump,
and some of the factors which can lead to a system that performs poorly.
The article is worthwhile reading for anyone who wants to get a better
grasp of how the Duo-Art system is suppose to function, and why so many
of them don't operate correctly. To read the article, go to
John A Tuttle
Brick, New Jersey, USA