Data set 01
1937 Osram Valves
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Optimum load resistance
5500 ohm
Published operating data
Power - Pentode Single (NOT beam) (under 10W) ·Pentode
N31
High-transconductance Osram series-heater power pentode for transformerless receiver output stages.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B7
- Base pins
- 7
- Nominal heater
- 26 V / 300 mA
Description
OSRAM N31 pentode for amplification or power-output service as specified in the supplied datasheet.
Socket description
Medium 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B7
- Base pins
- 7
- Nominal heater voltage
- 26 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.01 S
- Max plate voltage
- 200 V
- Max screen voltage
- 180 V
- Max plate dissipation
- 8 W
Published ratings and characteristics promoted from the approved datasheet.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 02
193X Osram
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater/Filament Voltage
26 V
Published datasheet value
Heater/Filament Current
300 mA
Published datasheet value
Maximum Anode Voltage
200 V
Published datasheet value
Maximum Screen Voltage
180 V
Published datasheet value
Maximum Anode Dissipation
8 W
Published datasheet value