Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - Beam (NOT sweep) ·BeamPower-Triode

ECF812

Combination triode and beam tetrode designed for television sync-separator and line-scan oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
-
Nominal heater
6.3 V / 500 mA

Description

Triode-beam-tetrode combination for television sync-separator and line-scan oscillator service.

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
-
Nominal heater voltage
6.3 V
Nominal heater current
500 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
2 W

Published source ratings and characteristics promoted where applicable; additional data retained as parameters.

Section 2

Beam Power

X-ray radiationInterelectrode capacitances
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
3 W

Published source ratings and characteristics promoted where applicable; additional data 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

1959 Ediswan

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Application

    Line-scan oscillator

CrossReference

  • Equivalent heater-independent family

    PCF812 / 30FL2

SECTION 2

Beam Power

Application

  • Application

    Sync separator / beam tetrode section