CLASSIFICATION
Globe-type bulb of glass, a white ceramic base with four-prong bayonet gold pins , oxide coated filamentary, solid plate, mesh plate triode.
APPLICATION
Audi amplifier Class A Service, Radio Amplifier Class B Service. Oscillaator Class C Service.
DIMMENSIONS
Dimensions, outline diagrams of the tube and bases, and the arrangement of electrode connections to the base terminals are shown in Figures 1 and 2.
SPECIFICATION
Nominal Operating Conditions
Filament voltage………………………………………………………4.5 V*
Nominal filament current……………………………………………… 1.2 A
Plate voltage…………………………………………………………300 V
Grid voltage…………………………………………………………?24 V
Plate resistance--------------------------------------------------------5.0 kohms
Plate current……………………………………………………………15 mA
Amplification factor…………………………………………………… 7.3
*Alternating-current filament supply or Direct-current filament supply.**Alternating-current filament supply is used. The grid and plate returns should be connected to a center tap on the secondary of the filament transformer.
***Direct-current filament supply is used. The grid and plate returns are connected to the negative end of the filament.
Limiting Operation Conditions for Safe Nor-nor simultaneous ratings
Maximum plate voltage…………………………………………… 400 volts
Maximum plate diissipation…………………………………………14 watts
Maximum plate current………………………………………………50mA