Voltage Tetrode ·Tetrode
Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.
Western Electric general-purpose tetrode with a 2.0 V, 1.6 A heater-type cathode 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 characteristics at plate 180 V, screen 75 V, grid -1.5 V. Maximum operating table includes 250 V plate and 90 V screen.
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
2 V
Heater Current
1.6 A
Maximum Plate Voltage
275 V
Maximum Screen Voltage
100 V
Maximum Heater-Cathode Voltage
100 V
Plate Voltage
180 V
ClassA
Plate Current
5.5 mA
ClassA
Amplification Factor
550
ClassA
Transconductance
1380 µS
ClassA
Plate Resistance
400000 ohm
ClassA
Data set 02
Published operating points and test conditions from this source.
ControlGridToPlateCapacitance
0.004 pF
ControlGridToHeaterCathodeScreenCapacitance
5.8 pF
PlateToHeaterCathodeScreenCapacitance
14 pF
Maximum Heater Cathode Voltage
90 V
Screen Grid Current
1.2 mA
PlateVoltage=180V;ScreenVoltage=75V;GridBias=-1.5V
Plate Current
5.5 mA
PlateVoltage=180V;ScreenVoltage=75V;GridBias=-1.5V
MicrophonicNoiseOutput
-20 dB re 1V
PlateVoltage=180V;ScreenVoltage=75V;GridBias=-1.5V;Load=100kohm