Voltage Tetrode ·Tetrode
Variable-mu screen-grid valve for high- or intermediate-frequency amplification, designed to reduce cross modulation and permit smooth receiver gain control through grid-bias variation.
A variable-mu screen-grid valve designed to reduce cross modulation and permit smooth gain control by grid-bias variation in H.F. or I.F. amplifiers.
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 ratings/characteristics promoted from the approved datasheet where legible.
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.
Typical screen voltage minimum
60 V
Published approximate operating data
Typical screen voltage maximum
80 V
Published approximate operating data
Grid bias operating range minimum
-40 V
Published approximate operating data
Grid bias operating range maximum
-4 V
Published approximate operating data
Data set 02
Published operating points and test conditions from this source.
Heater Voltage
4 V
Published datasheet value
Heater Current
1 A
Published datasheet value
Anode Voltage Maximum
250 V
Published datasheet value
Screen Voltage Maximum
80 V
Published datasheet value
Mutual Conductance
2400 µS
Published datasheet value
Data set 03
Published operating points and test conditions from this source.
Heater/Filament Voltage
4 V
Heater/Filament Current
1 A
Transconductance
1100 uS
Amplification Factor
500
Plate Resistance
450000 ohm
Maximum/Published Anode Voltage
200 V
Maximum/Published Screen Voltage
70 V
Gain-control bias range
-14 to -40 V
Typical screen voltage
60-80 V