Data set 01
2026 Western Electric 400s
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Typical peak output voltage
50 V
PlateVoltage=190V;LoadResistance=0.3Mohm
Voltage - Triode (single) ·Triode
441A
Western Electric filamentary triode for voice- and carrier-frequency voltage amplification, detector, and modulator service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater
- 2.2 V / 500 mA
Description
Western Electric 441A is a filamentary triode for voice- and carrier-frequency voltage amplification, detector, or modulator service.
Socket description
Medium-shell UX 4-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater voltage
- 2.2 V
- Nominal heater current
- 500 mA
- 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
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 39000 Ω
- Transconductance
- 0.0008 S
- Amplification factor
- 31
- Max plate voltage
- 200 V
- Max plate dissipation
- 0.5 W
Promoted from absolute maximum ratings and representative published typical characteristics.
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.