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Classification-column type bulb of glass, copper ceramic base with four gold pins , oxide coated filamentary, carbon plate, triode.
Application-Audio power amplifier Class A1 or Class AB1 .
Dimensions-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.

Nominal operating conditions and parameters
Filament voltage……………………………………………………………10.0V
Nominal filament current……………………………………………………3.25 A
Plate voltage…………………………………………………………………1250 V
Grid voltage…………………………………………………………………－200 V
Plate current…………………………………………………………………80 mA
Plate resistance……………………………………………………………1.7kohms
Amplification factor…………………………………………………………… 5.0
Load resistance…………………………………………………………… 3.4 kohms
Signal voltage(pk)………………………………………………………………69.0V
Output power…………………………………………………………………15W
Suggest operating conditions and parameters
Class A1 power amplifier of single tube

Class AB1 power amplifier of push-pull

Figure 3 . shown typical curves of plate currents of grid voltage for several values of plate voltages. It is alternating-current filament supply.

Limiting Operation Conditions for Safe Nor-nor simultaneous ratings
Maximum plate voltage………………………………………………………… 1250 volts
Maximum plate dissipation………………………………………………………75 watts
Maximum plate current ……………………………………………………………120 mA
Maximum input powe of signal …………………………………………………… 150 V

Price : 1 unit