Voltage - Triode (single) ·Triode
Western Electric general-purpose directly heated triode with oxide-coated filament and published Class A operating data.
Western Electric general-purpose triode with a 3.1 V, 0.06 A oxide-coated filament and a published Class-A operating point.
Medium 4-contact bayonet 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
Representative maximum-operating table point: 135 V plate, -7.5 V grid, 2.50 mA plate current.
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.
Heater Voltage
3.1 V
Heater Current
60 mA
Maximum Plate Voltage
150 V
Plate Voltage
90 V
ClassA
Plate Current
2.1 mA
ClassA
Power Output
0.0045 W
ClassA
Amplification Factor
8.4
ClassA
Transconductance
510 µS
ClassA
Plate Resistance
16300 ohm
ClassA
Data set 02
Published operating points and test conditions from this source.
Grid To Plate Capacitance
3 pF
Grid To Filament Capacitance
1.8 pF
Plate To Filament Capacitance
2.3 pF
Plate Current
2.5 mA
MaximumOperatingCondition;PlateVoltage=135V;GridBias=-7.5V
MicrophonicNoiseOutput
-22 dB re 1V
PlateVoltage=90V;GridBias=-3V;Load=100kohm