Data set 01
1945 United Electronics
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
Filament voltage
10 V
Nominal general rating
Filament current
5 A
Nominal general rating
Rectifier - Half Wave ·Rectifier
878
Directly heated half-wave rectifier with exceptional mechanical ruggedness for industrial electronic equipment. Its construction emphasizes resistance to vibration, shock, and demanding thermal conditions.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- MEDIUM4BAYONET
- Base pins
- -
- Nominal heater
- 10 V / 5 A
Description
The UNITED type 878 is a tube of exceptional physical ruggedness. This design not only takes into account important electrical and thermal considerations, but end use conditions involving vibration and shock such as encountered in industrial electronic equipment.
Socket description
Medium 4-contact bayonet base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- MEDIUM4BAYONET
- Base pins
- -
- Nominal heater voltage
- 10 V
- Nominal heater current
- 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
1 physical section, each with unique specifications.
Section 1
Rectifier
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Published ratings and characteristics promoted where directly established; remaining useful published data retained as parameters.
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.