Voltage Pentode or Tetrode (under 100V) ·Pentode
Ultra-low-drain directly heated subminiature pentode for portable and wearable voltage amplification, using only a 0.625 V, 15 mA filament.
Directly heated subminiature voltage-amplifier pentode for portable and wearable equipment.
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 subminiature operating-table characteristics; plate/screen voltages below are typical operating values, not promoted as maxima.
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
15 mA
Nominal
Maximum Plate Voltage
30 V
Maximum Screen Voltage
30 V
Maximum Cathode Current
0.1 mA
Transconductance
36 µS
Typical
Plate Resistance
5000000 ohm
Typical
Data set 02
Published operating points and test conditions from this source.
Plate voltage
15 V
Grid 1 voltage
-0.625 V
Grid 2 voltage
15 V
Plate current
0.0047 mA
Grid 2 current
0.0014 mA
Plate resistance
12 MOhm
Transconductance
20 uS