Power - Pentode Single (NOT beam) (under 10W) ·Pentode
Osram power pentode for conventional audio-frequency amplification and output service.
OSRAM MPT4 pentode for amplification or power-output service as specified in the supplied datasheet.
European 5-pin base
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 characteristics/ratings were promoted when unambiguous; remaining operating values are preserved in TUBE_SECTION_PARAMETER.
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.
Anode current
32 mA
Anode 250 V; screen 200 V; grid bias -10.5 V
Screen current
5.5 mA
Anode 250 V; screen 200 V; grid bias -10.5 V
Data set 02
Published operating points and test conditions from this source.
Optimum load resistance
8000 ohm
Published operating data
Data set 03
Published operating points and test conditions from this source.
Heater/Filament Voltage
4 V
Published datasheet value
Heater/Filament Current
1 A
Published datasheet value
Maximum Anode Voltage
250 V
Published datasheet value
Maximum Screen Voltage
200 V
Published datasheet value
Maximum Anode Dissipation
8 W
Published datasheet value
Plate Resistance
33000 ohm
Published datasheet value
Mutual Conductance
3000 µS
Published datasheet value
Amplification Factor
100
Published datasheet value
Data set 04
Published operating points and test conditions from this source.
Filament/heater voltage
4 V
Filament/heater current
1 A
Maximum anode voltage
250 V
Maximum screen voltage
200 V
Maximum anode dissipation
8 W
Typical output power
3.2 W
ClassA
Amplification factor
600
Transconductance
3000 uS