Power - Pentode (NOT beam) ·Pentode
Subminiature output pentode with a 1.25 V, 25 mA filament for very-low-power Class-A audio service. Its compact construction targets miniature battery-operated equipment.
Subminiature output pentode with a 1.25 V, 25 mA filament for very-low-power Class-A audio output service.
Subminiature all-glass 8-wire lead family
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
Published Mullard/Philips ratings and characteristics promoted where applicable; additional values retained as parameters.
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.
Plate Voltage
45 V
ClassA
Screen Voltage
45 V
ClassA
Plate Current
0.6 mA
Screen Current
0.15 mA
Transconductance
550 µS
Plate Resistance
350000 ohm
Data set 02
Published operating points and test conditions from this source.
Application
Battery audio output
Intended equipment
Hearing aid
Data set 03
Published operating points and test conditions from this source.
Anode voltage
45 V
ClassA
Anode current
0.6 mA
ClassA
Screen-grid current
0.15 mA
ClassA
Load resistance
100 kOhm
ClassA