Voltage - Triode (single) ·Triode
Directly heated two-volt OSRAM triode for battery-operated receiver and amplifier service.
HL2: OSRAM triode valve. The complete approved OSRAM sheet was read for construction, characteristics, operating data, and application guidance.
European 4-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 characteristics/ratings were promoted when unambiguous; remaining operating values are preserved in TUBE_SECTION_PARAMETER.
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.
Anode voltage
50 to 150 V
Grid-leak detector
Anode voltage
75 to 150 V
Anode-bend detector
Anode voltage
100 to 150 V
Low-frequency amplifier
Data set 02
Published operating points and test conditions from this source.
Heater/filament voltage
2 V
Heater/filament current
100 mA
Plate impedance
18000 ohm
Mutual conductance
1500 uS
Amplification factor
27
Application
HF amplifier, detector, and LF amplifier
Maximum anode voltage
150 V
Average anode current at 150 V
1.75 mA
Data set 03
Published operating points and test conditions from this source.
Filament/heater voltage
2 V
Filament/heater current
100 mA
Amplification factor
105
Plate impedance
18000 ohm
Mutual conductance
1500 uS
Data set 04
Published operating points and test conditions from this source.
Filament Voltage
2 V
Filament Current
400 mA
Amplification Factor
27
Transconductance
1500 uS
Plate Resistance
18000 ohm
Maximum/Published Anode Voltage
150 V
Typical LF Amplifier Anode Voltage
100-150 V
Grid-Anode Capacitance
4 pF
Grid-Cathode Capacitance
8 pF
Anode-Cathode Capacitance
9 pF