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Power - Triode Single (under 10W) ·Triode

ED

Power triode designed for output-amplifier service, providing substantial low-frequency output in receiving or audio equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
POST7
Base pins
-
Nominal heater
4 V / 650 mA

Description

Power triode for output-amplifier service.

Socket description

German 7-contact Postsockel

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
POST7
Base pins
-
Nominal heater voltage
4 V
Nominal heater current
650 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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
30000 Ω
Transconductance
0.001 S
Amplification factor
30
Max plate voltage
250 V
Max plate dissipation
1.5 W
Max cathode current
15 mA

Published ratings and characteristics promoted from the approved German 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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    4 V

    Nominal

  • HeaterCurrentNominal

    650 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Plate Dissipation

    1.5 W

  • Maximum Cathode Current

    15 mA

Characteristic

  • Transconductance

    1000 µS

    Typical

  • Amplification Factor

    30

    Typical

  • Plate Resistance

    30000 ohm

    Typical

Data set 02

1963 Siemens

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Input capacitance

    9 pF

  • Output capacitance

    5 pF

  • Grid-to-plate capacitance

    17 pF