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Voltage Pentode ·Pentode

EF802

Long-life professional RF/IF pentode with stable characteristics for continuously operated communications equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 275 mA

Description

Long-life RF/IF pentode.

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
275 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
300000 Ω
Transconductance
0.008 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
2.1 W
Max screen dissipation
0.55 W
Max cathode current
16 mA

Published Telefunken values promoted where applicable; additional values retained as 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

1953 AEG

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Typical Plate Voltage

    170 V

  • Typical Screen Voltage

    170 V

  • Typical Plate Current

    12 mA

  • Typical Screen Current

    3 mA

Capacitance

  • Input Capacitance

    7.6 pF

  • Output Capacitance

    1.9 pF