Voltage - Triode (single) ·Triode
OSRAM triode for general electronic service; available source material does not establish a narrower functional application confidently.
HA1: 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 promoted where reliably identified; additional source values retained below.
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/filament voltage
4 V
Heater/filament current
300 mA
Plate impedance
11800 ohm
Mutual conductance
1700 uS
Amplification factor
20
Application
Ultra-short-wave reception/transmission and UHF amplification
Maximum anode voltage
180 V
Anode current
4.5 mA
Data set 02
Published operating points and test conditions from this source.
Amplification factor
20
Plate impedance
11800 ohm
Mutual conductance
1700 uS
Data set 03
Published operating points and test conditions from this source.
Filament Voltage
4 V
Filament Current
250 mA
Maximum Anode Current
4.5 mA
Detector Anode Voltage
100-150 V
Oscillator Frequency
600 MHz
Maximum/Published Anode Voltage
300 V
Grid-Anode Capacitance
1.4 pF
Grid-Cathode Capacitance
1 pF
Anode-Cathode Capacitance
0.6 pF