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TAKATSUKI TA-274B Rectifier Vacuum Tubes The TA-274B rectifier tube is their second made-in-Japan audio vacuum tube, developed by maximizing their technologies and know how in the creation of the 300B. The TA-274B delivers the ultimate vacuum tube quality that only Takatsuki Electric can offer. Made-in-Japan: The Takatsuki engineering team has refused to accept compromise. Each TA-274B tube is manufactured and assembled with choice materials and stringent quality control. Luxurious Luxuriation: Watch as warm light passes through the glass tube, enhancing the luxury of your hifi music experience. Specifications Type: Twin diode tube  Product name: TA-274B  Configuration: Directly heated twin diode tube  Filament: voltage/current 5V/2A　 AC Maximum plate voltage: (RMS)    660 V/plate  Maximum DC output: current 225mA  Maximum transient current: 2.5 A 20 msec or less  Peak plate current: 700 mA/plate