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Voltage - Triode (single) ·Triode

B406

Early directly heated four-volt receiving triode for battery-operated amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
A32
Socket code
B4
Base pins
4
Nominal heater
4 V / 100 mA

Description

B406 is listed in the supplied tube table as a triode. Published electrical values were transcribed from its target row.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
A32
Socket code
B4
Base pins
4
Nominal heater voltage
4 V
Nominal heater current
100 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

A32 - 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
4500 Ω
Transconductance
0.0013 S
Amplification factor
6
Max plate voltage
150 V

Published table ratings and electrical characteristics reviewed; ambiguous cells were not inferred.

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

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Maximum plate voltage

    150 V

    Published table rating

  • Plate voltage

    150 V

    Published operating point

  • Control-grid bias

    15 V

    Published operating point

  • Plate current

    8 mA

    Published operating point

Characteristic

  • Plate resistance

    4500 ohm

    Published table characteristic

  • Amplification factor

    6

    Published table characteristic

  • Heater/filament voltage

    4 V

    Published heater/filament rating

  • Heater/filament current

    100 mA

    Published heater/filament rating

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Typical anode voltage

    150 V

    Published datasheet value

  • Normal anode current

    8 mA

    Published datasheet value

  • Grid bias

    -13 V

    Published datasheet value

Characteristics

  • Maximum transconductance

    - to 1.4 mA/V

    Published datasheet value

  • Normal transconductance

    1.3 mA/V

    Published datasheet value

  • Normal internal resistance

    4500 Ω

    Published datasheet value