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Power - Triode ·Triode

3B151A

Directly heated power triode for moderate audio or RF output service. Its low plate resistance, amplification factor around seven, 15 W plate dissipation, and 400 V plate capability suit general-purpose power amplification.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
MEDIUM4BAYONET
Base pins
4
Nominal heater
4.5 V / 1.6 A

Description

Power triode.

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
4
Nominal heater voltage
4.5 V
Nominal heater current
1.6 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
Plate resistance
3500 Ω
Transconductance
0.002 S
Amplification factor
7
Max plate voltage
400 V
Max plate dissipation
15 W
Max cathode current
50 mA

Published triode ratings/characteristics promoted from the approved datasheet.

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

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Grid-anode capacitance

    6.2 pF

    Direct inter-electrode capacitance

  • Grid-filament capacitance

    5 pF

    Direct inter-electrode capacitance

  • Anode-filament capacitance

    32 pF

    Direct inter-electrode capacitance