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Voltage Triode Pentode ·Pentode-Triode

ECF201

Triode-pentode combination for electronic signal service; available source material does not establish a narrower functional application confidently.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 410 mA

Description

Triode-pentode for oscillator/separator service and variable-mu IF amplification.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
410 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
Max plate voltage
250 V
Max plate dissipation
1.5 W
Max cathode current
18 mA

Source-published values promoted where directly stated; additional values retained in parameter table.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Transconductance
0.0126 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
2.1 W
Max screen dissipation
0.7 W
Max cathode current
20 mA

Source-published values promoted where directly stated; additional values retained in parameter table.

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

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    410 mA

    Published nominal value

Other

  • Maximum plate dissipation

    1.5 W

    Published maximum rating

SECTION 2

Pentode

Characteristics

  • Heater voltage

    6.3 V

    Published nominal value

  • Heater current

    410 mA

    Published nominal value

  • Transconductance

    12600 µS

    Published nominal or operating characteristic

  • Pentode transconductance

    12.6 mA/V

    Published nominal value

Other

  • Maximum plate dissipation

    2.1 W

    Published maximum rating

Data set 02

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 2

Pentode

Other

  • Heater voltage Vg

    6.3 V

  • Heater current If

    410 mA

Data set 03

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 2

Pentode

Other

  • Heater voltage Vg

    6.3 V

    Heater voltage Vg 6.3 V

  • Heater current If

    410 mA

    Heater current If 410 mA