Power - Triode ·Triode
Low-mu directly heated Western Electric audio power triode for substantial single-ended Class A output. Manufacturer operating data supports about 40 W output from a 1.25 kV plate supply, with 100 W maximum plate dissipation.
Air-cooled transmitting triode for Class A audio service.
Super Jumbo 4-pin bayonet
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Maximum ratings and characteristic constants promoted where reliably published in the approved sheet.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Filament voltage
10 V
Filament current
3.25 A
Maximum direct plate voltage
1250 V
Maximum plate dissipation
100 W
Data set 02
Published operating points and test conditions from this source.
HeaterOrFilamentVoltage
10 V
HeaterOrFilamentCurrent
3.25 A
Typical Plate Voltage
1250 V
ClassA;Audio
Typical Power Output
40 W
ClassA;Audio
Data set 03
Published operating points and test conditions from this source.
Grid To Filament Capacitance
6 pF
Plate To Filament Capacitance
5.6 pF
MaximumDirectGridCurrent
100 mA
MaximumFrequencyAtFullRatings
6 MHz