EF816

Double-anode fixed-slope pentode designed specifically for extraction and separation of television synchronizing signals. Its specialized electrode structure performs sync-separator functions rather than ordinary RF or IF voltage amplification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 300 mA

Description

Double-anode fixed-slope pentode for extraction and separation of television synchronizing signals.

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: 300 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

Transconductance: 0.0085 S
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 1.2 W
Max screen dissipation: 0.9 W
Max cathode current: 26 mA

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.

No source-specific operating conditions are recorded.