Vintage Simmons Drums (UK) Users Group

Hello,
I own lot of old Edrum brains,some analog:

  SDS5
  SDS8
  SDS7 analog section
  SDS9 & SDS1000 tom sections
  TS305 TAMA
  DRX1 PEARL
For me the better is the DRX1 with 3 oscillators,discretes VCA & VCF...
It is much more playable than the TS305 or the SIMMONS....
I have drawn it's schematic,it is very interesting,only standart 
components (no Curtiss chips) like the TS305.
I need time to draw clean schematics on my PC....
See you soon all,
      Thierry EPPHERRE