Power supply for tube based equipment with flexible tube compatibility Power supply: DC1216V, current 1A or more (DC12V 1.5A supply power is recommended) Power socket: DC3.5/5.5*21 Tube: 6J3 (The tube is disassembled) Product supports replaceable tubes: 6J1 6J2 6J3 6J4 6J5 6A2 6K4 6K5 6AK5 6AU6 6BA6 6BD6 EF93 6K7 GE5654 etc. Key benefits Wide tube compatibility: supports a broad range of tubes, allowing you to tailor performance and tubes as needed. Flexible power input: accepts a DC input from 12 to 16 volts, with 1 A or more, giving versatility for different setups and power sources. Ready for tube experimentation: the 6J3 tube is provided (disassembled) and ready for use in compatible circuits, with clear guidance on compatible replacement tubes. Simplified integration: uses a standard DC power configuration and socket, designed to fit common tubebased projects and equipment. Specifications and compatibility Input voltage: DC 12 V to 16 V Input current: 1 A or more (recommended 12 V 1.5 A for performance) Power socket: DC 3.5/5.5*21 Tube provided: 6J3 (tube is disassembled) Replaceable tube compatibility: 6J1, 6J2, 6J3, 6J4, 6J5, 6A2, 6K4, 6K5, 6AK5, 6AU6, 6BA6, 6BD6, EF93, 6K7, GE5654, etc. Use scenarios DIY tube amplifier project: provide a stable DC supply compatible with a range of tubes, enabling experimentation with different tube configurations and sound characteristics. Vintage radio or audio gear : power and test tubebased circuits using a flexible set of compatible tubes, aiding diagnostic and restoration work. Educational electronics experiments: teach tube circuitry concepts with a controllable supply and easy tube swap options to observe how different tubes affect performance. Notes The 6J3 tube is supplied in disassembled form. The listed tubes are supported as replacements; ensure your circuit requirements match the tube type selected.