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Power - Pentode (NOT beam) ·Pentode

B543

Philips directly heated output pentode with screen-grid operation, using a 5 V, 0.10 A filament and typical 200 V anode operation. Designed for receiver power-output service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
5 V / 100 mA

Description

Philips B543 is a directly heated output valve with screen-grid operation, intended for power output service. The sheet specifies a 5 V, 0.10 A filament and typical 200 V anode operation.

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
5 V
Nominal heater current
100 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

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
45000 Ω
Transconductance
0.0013 S
Amplification factor
60

Published ratings and characteristics promoted where semantically applicable; additional published values retained as section parameters.

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

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Anode voltage

    200 V

    Published datasheet value

  • Screen-grid voltage

    150 V

    Published datasheet value

  • Normal anode current

    12 mA

    Published datasheet value

  • Grid bias

    -15 V

    Published datasheet value

Characteristics

  • Maximum transconductance

    - to 1.5 mA/V

    Published datasheet value

  • Normal transconductance

    1.3 mA/V

    Published datasheet value

  • Internal resistance

    45 kΩ

    Published datasheet value

  • Amplification factor

    60

    Published datasheet value