4JL6

Semi-remote-cutoff pentode designed for AGC-controlled television picture-IF or related television amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 4.2 V / 600 mA

Description

4JL6 is an explicitly covered designation on the 6JL6 source sheet. Semi-remote-cutoff frame-grid pentode with very high transconductance for AGC-controlled television IF amplifiers.

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: 4.2 V
Nominal heater current: 600 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: 120000 Ω
Transconductance: 0.0155 S
Max plate voltage: 275 V
Max screen voltage: 275 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.6 W
Max cathode current: 22 mA

Published maximum ratings and characteristics promoted semantically from the approved 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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Plate Resistance
120000 ohm
Transconductance
15500 µS

Other

Maximum Plate Voltage
275 V
Maximum Screen Voltage
275 V
Maximum Plate Dissipation
2.5 W
Maximum Screen Dissipation
0.6 W
Maximum Cathode Current
22 mA
Plate Voltage
125 V
ClassA
Screen Voltage
60 V
AGC-controlled IF service
Plate Current
12.5 mA
ClassA