Vintage Simmons Drums (UK) Users Group

Thierry EPPHERRE can repair SDS7 Modules without brain soon, he is constructing an adaptor. But why repair it without a brain? Is that something like sports?

There must be two trimmers on the backplane: The bigger metal one is noise volume. The little cermet trimmer is part of a very interesting noise suppression circuit and was one of the early mods Simmons had to do, because the data rails noised into l/r and mono summing.
Michael 

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