Data set 01
192X Marconi Valve
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
DC output voltage
350 V
Published approximate operating data
Rectifier - Full Wave ·Rectifier-Rectifier
U12
Directly heated full-wave rectifier with dual electrode system for AC mains supplies, designed for long life and stable emission while providing approximately 120 mA DC output.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B4
- Base pins
- 4
- Nominal heater
- 4 V / 2.5 A
Description
Full-wave rectifying valve with a dual electrode system for A.C. mains supplies, designed for long life and constant emission at rated filament voltage.
Socket description
European 4-pin base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B4
- Base pins
- 4
- Nominal heater voltage
- 4 V
- Nominal heater current
- 2.5 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Rectifier
X-ray radiationInterelectrode capacitances
- Rectifier peak inverse voltage
- 1000 V
- Rectifier nominal output current
- 120 mA
- Rectifier max heater-cathode voltage
- 0 V
Published maximum ratings and characteristics audited; remaining useful numerical data retained in parameter table.
Section 2
Rectifier
X-ray radiationInterelectrode capacitances
- Rectifier peak inverse voltage
- 1000 V
- Rectifier nominal output current
- 120 mA
- Rectifier max heater-cathode voltage
- 0 V
Physical rectifier section 2; identical section values duplicated per physical-section policy.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 02
1937 Osram Valves
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
Heater Voltage
4 V
Published datasheet value
Heater Current
2.5 A
Published datasheet value
Anode Voltage RMS
350 V
EachAnode
Rectified DC Current
120 mA
Published datasheet value
DC Output Voltage
325 V
At maximum rated AC input
Data set 03
1955 Marconi
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
Heater/filament voltage
4 V
Heater/filament current
2.5 A
Peak inverse voltage
1000 V
Nominal/maximum output current
120 mA
Construction
Rectifier topology
Bi-phase/full-wave