Data set 01
1956 Western Electric Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Tube service
Transmitting tube
Other
Typical Class-B RF power output
9000 W
ClassB
Power - Triode (over 1000V 100W) ·Triode
340A
Western Electric water-cooled transmitting triode for high-power Class B RF service. Approximately 25 kW plate dissipation and 20 kV plate capability place it in major fixed transmitter installations requiring very large radio-frequency output.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- SMALL5
- Base pins
- -
- Nominal heater
- 20 V / 72 A
Description
Water-cooled high-power transmitting triode for Class-B RF service.
Socket description
Small 5-contact transmitting-tube base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- SMALL5
- Base pins
- -
- Nominal heater voltage
- 20 V
- Nominal heater current
- 72 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
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.00682 S
- Amplification factor
- 40
- Max plate voltage
- 20000 V
- Max plate dissipation
- 25000 W
Values extracted from Western Electric summary tables; additional table 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.