Voltage Pentode or Tetrode (under 100V) ·Pentode
Subminiature low-frequency pentode for hearing aids and other very-low-power battery equipment. Its directly heated construction targets compact audio voltage amplification where minimal filament consumption is essential.
Subminiature low-frequency pentode for hearing aids and other very-low-power battery equipment.
Subminiature all-glass 8-wire lead family
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 and characteristics promoted from the printed technical data.
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.
HeaterVoltageNominal
0.625 V
Nominal
HeaterCurrentNominal
13.3 mA
Nominal
Maximum Plate Voltage
45 V
Maximum Screen Voltage
45 V
Maximum Plate Dissipation
0.0015 W
Maximum Screen Dissipation
0.0005 W
Maximum Cathode Current
0.05 mA
Data set 02
Published operating points and test conditions from this source.
Control-grid capacitance
1.5 pF
Plate capacitance
1.5 pF
Grid-to-plate capacitance
- to 0.2 pF
Plate voltage
22.5 V
HearingAid
Screen voltage
18 V
HearingAid
Plate current
0.05 mA
HearingAid
Screen current
0.01 mA
HearingAid
Grid voltage
-1.15 V
HearingAid
Transconductance
100 uS
Data set 03
Published operating points and test conditions from this source.
Input capacitance
1.5 pF
Output capacitance
1.5 pF
Plate-grid capacitance maximum
0.2 pF
Plate voltage
22.5 V
Screen voltage
18 V
Plate current
0.05 mA
Screen current
0.01 mA
Grid bias
-1.15 V
Transconductance
100 uS
Plate resistance
4 Mohm
Screen-grid amplification factor
8.7