Voltage - Triode (single) ·Triode
OSRAM triode for general electronic service; available source material does not establish a narrower functional application confidently.
H42: OSRAM triode valve. The complete approved OSRAM sheet was read for construction, characteristics, operating data, and application guidance.
Medium 7-contact
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
600 mA
Plate impedance
0 ohm
Mutual conductance
1500 uS
Amplification factor
100
Application
Detector and early audio-frequency amplifier
Maximum anode voltage
250 V
Data set 02
Published operating points and test conditions from this source.
Amplification factor
100
Plate impedance
66 ohm
Mutual conductance
1500 uS