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Transcript
Svetlana 300B Low-Mu Audio Power Triode The Svetlana 300B is a power triode intended for use in class A, AB or B audio amplifiers. It is one of the TM lowest-distortion tubes ever made, and is a close duplicate of the original Western Electric 300B. The Svetlana 300B uses ultra-pure carbonized nickel plate material and a proprietary oxide coating on the TM filament to give Western Electric -like performance. The internal structure is well-supported and is aligned with respect to the base pins to avoid internal shorts in equipment designed for horizontal tube mounting. The filament is center-tapped to insure low hum. The Svetlana 300B is manufactured in Russia at the Svetlana factory in St. Petersburg. The strict manufacturing and quality controls at the Svetlana plant assure functionality and sound as good as Western ElectricTM manufactured products. Electrical Filament Voltage(AC,DC) Current Amplification factor Transconductance Plate resistance Interelectrode capacitances(typical), with filament grounded: Grid to filament Grid to plate Maximum Ratings DC plate voltage Signal DC plate current Plate dissipation Oxide-coated tungsten 5.0±0.3 1.2 3.85 5,500 700 μS Ω 9 15 pF pF 450 100 40 V mA W V A Typical Operation Audio Amplifier, Class A DC plate voltage 450 V Grid(control) voltage -100 V Peak grid drive 200 VP-P Zero signal plate current 60 mA Max signal plate current 65 mA Effective load resistance 5,500 Ω Distortion at 1 watt into 8 ohms 0.10 % Output power at 5% distortion 10 W Notes: The internal structure is aligned with respect to the base pins to avoid internal shorting problems in equipment designed for horizontal mounting. Pins 1 and 4 should be in a horizontal plane when mounting the device horizontally. http://tec-sol.com/