HH Scott 99D   Mono 6L6 integrated amp. Schematic 130    Preamp  Schematic (Thanks to Raymond Koonce) 299    Uses 7189 output tubes and 6BL8 phase-inverter/driver Schematic 299C   Uses 7591 output tubes and 6GH8/6U8 phase-inverter/driver Schematic Page 1 Schematic Page 2 222 Schematic Page 1 Schematic Page 2 335/LM-35 Multiplex Adaptor Schematic Page 1 Schematic Page 2 Service Notes Page 1 Service Notes Page 2