2 X TUBES EL34B NEUFS MATCHED PAIR, PENTODES ELECTRON TUBE - À CHANTEPIE

2 x Tubes EL34B neufs MATCHED PAIR, pentodes Electron Tube - Made in China.   EL34 vacuum tube is a high capacity audio frequency output pentode tube, cathode limit dissipation power is 25W. In audio frequency amplifier, matched pair tubes are used to amplify the power of AB1 series, the output power will be larger than 35W. EL34 is the same with 6CA7, and can be exchanged. heater heating: UH……………………………6.3 V IH……………………………1.5 A  limit rating: plate voltage……………………… 800 V  second grid voltage………………… 500 V  first grid voltage………………… -100 V  plate dissipation power………………… 25 W  second grid dissipation power…………… 8 W  cathode current………………………150 mA  first grid resistance when it is self-partial voltage…………0.7 MΩ  when it is fixup partial voltag…………0.5 MΩ  heatervoltage between cathodes…………±100 V  temperature of glass crust………………250