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Power - Triode ·Triode

3B252B

Power triode intended for audio-frequency and radio-frequency service. Low plate resistance, moderate amplification factor, 25 W plate dissipation, and 600 V plate capability provide useful current capacity for driver, output, and transmitter stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5
Base pins
5
Nominal heater
6 V / 1.4 A

Description

Power triode for audio and radio-frequency service.

Socket description

European 5-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B5
Base pins
5
Nominal heater voltage
6 V
Nominal heater current
1.4 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
1670 Ω
Amplification factor
15
Max plate voltage
600 V
Max plate dissipation
25 W
Max cathode current
170 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

    8 pF

    Direct inter-electrode capacitance

  • Grid-cathode capacitance

    4 pF

    Direct inter-electrode capacitance

  • Anode-cathode capacitance

    10 pF

    Direct inter-electrode capacitance

Data set 02

1947 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid-anode capacitance

    8 pF

  • Grid-cathode/filament capacitance

    4 pF

  • Anode-cathode/filament capacitance

    10 pF

Other

  • Maximum frequency for published rating

    45 MHz

  • Maximum direct grid current

    30 mA