Vintage Simmons Drums (UK) Users Group

Hello my name is Thierry EPPHERRE
I am an electronician and I love Electronics drums.
I own a Roland TR707
      a Alesis D4
      a Simmons SDS9
      a Simmons SDS1000
      a Simmons MTX9
      a Pearl DRX1  (very good 5 channels analog drum synth!!)
 I want to build my own drum synth.
 I am drawing the schematics of my SDS9 (analog toms with 
CEM3394,digital snare & rim whith CEM3372 filter,computed bass 
drum....
 I have to drawn the computer section.
If you are interested....
Sorry for my bad english,I am french....