Reply To: Schematics for AU90 transformer modification home › Forums › General Discussion › Schematics for AU90 transformer modification › Reply To: Schematics for AU90 transformer modification November 25, 2020 at 11:01 pm #596 hifibuffParticipant I found this from my dusty files. These were a tight fit in my A3 backplates. Attachments:You must be logged in to view attached files.