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Voltage - Dual Triode (similar) ·Triode-Triode

B240

European double triode documented in Philips receiving-tube literature; available source material establishes its electrical characteristics but does not clearly identify a narrower specialized functional role.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
-
Base pins
-
Nominal heater
2 V / 200 mA

Description

B240 is listed in the supplied tube table as a double triode. Published electrical values were transcribed from its target row.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
2 V
Nominal heater current
200 mA
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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
14000 Ω
Max plate voltage
150 V

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

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
14000 Ω
Max plate voltage
150 V

Second physical triode section; added to align rows with SectionCount.

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

  • Plate current

    1.5 mA

    Published operating point

Characteristic

  • Plate resistance

    14000 ohm

    Published table characteristic

  • Heater/filament voltage

    2 V

    Published heater/filament rating

  • Heater/filament current

    200 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

  • Plate current per anode

    1.5 mA

    ClassB

  • Output power

    1 W

    ClassB