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Power - Triode ·Triode

356B

Western Electric directly heated air-cooled transmitting triode for Class C RF power and plate-modulated service. Its 60 W plate dissipation and 1.5 kV capability suit moderate-power radio transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4A
Base pins
4
Nominal heater
5 V / 5 A

Description

The Western Electric 356B is a directly heated air-cooled transmitting triode for Class C RF power and plate-modulated service.

Socket description

4-contact B4A physical base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B4A
Base pins
4
Nominal heater voltage
5 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

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0038 S
Amplification factor
50
Max plate voltage
1500 V
Max plate dissipation
60 W

Air-cooled transmitting triode.

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 01

1956 Western Electric Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum Plate Current

    120 mA

  • Maximum Frequency

    100 MHz

  • Typical Maximum Power Output

    85 W

    ClassC; RF; PlateModulated

Characteristics

  • Typical Plate Voltage

    600 V

  • Typical Plate Current

    100 mA