Looking for Senheiser schemtics please anyone

Im looking for sennheiser condenser mic schematics any would be interestin... I have aquired a radio mic capsule ME5005 its expensive and im told good, I want to fire it up & put it in an old fashioned reslo case or some thing similar, I was told by sennheiser tech it has FET on it but will need a pre amp as in the orig handheld radio mic, so maybe I can knock something up ....ooooo maybe I could build a tube pre for it...cool, any ideas would be welcome

thanks...................Gary O.