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Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode

EBC11

Double-diode triode combining receiver detection and control-voltage rectification with audio-frequency voltage amplification. Paired diodes handle detector and AVC functions while the triode amplifies the recovered audio signal.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
-
Socket code
P8A
Base pins
-
Nominal heater
6.3 V / 200 mA

Description

Double-diode triode for detector, AVC, and audio-frequency amplifier service.

Socket description

European 8-pin side-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
P8A
Base pins
-
Nominal heater voltage
6.3 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

3 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published Telefunken ratings and characteristics promoted from the supplied source.

Section 2

Diode

X-ray radiationInterelectrode capacitances
Max plate voltage
200 V
Rectifier nominal output current
0.8 mA

Published Telefunken ratings and characteristics promoted from the supplied source.

Section 3

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
10000 Ω
Transconductance
0.0022 S
Amplification factor
25
Max plate voltage
300 V
Max plate dissipation
1.5 W
Max cathode current
10 mA

Published Telefunken ratings and characteristics promoted from the supplied source.

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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    200 mA

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 2

Diode

Other

  • Maximum diode current

    0.8 mA

  • Maximum diode peak voltage

    200 V

SECTION 3

Triode

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    200 mA

  • Typical plate voltage

    250 V

  • Transconductance

    2200 uS

  • Amplification factor

    25

  • Plate resistance

    11500 ohm

Other

  • Maximum plate voltage

    300 V

  • Maximum plate dissipation

    1.5 W