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Voltage Radio Detector Converter ·Pentode-Triode

LCF86

Frame-grid triode-pentode used as a combined oscillator and mixer in VHF color and black-and-white television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 600 mA

Description

Miniature type with frame-grid pentode unit used as 9MP combined oscillator and mixer tubes in vhf color and black-and-white television receivers. Outlines section, 6B; requires minia- ture 9-contact socket. Types 5HG8/LCF86 and 7HG8/PCF86 are identical with type 6HG8/ECF86 except for heater ratings. 5HG8/ 6HG8/ 7HG8/ LCF86 ECF86 PCF86

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
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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
150000 Ω
Transconductance
0.01 S
Amplification factor
40
Max plate voltage
250 V
Max plate dissipation
2 W
Max cathode current
18 mA

Published maximum ratings, characteristics, typical operation, rectifier data, and capacitances reviewed.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
150000 Ω
Transconductance
0.01 S
Amplification factor
40
Max plate voltage
250 V
Max screen voltage
160 V
Max plate dissipation
2 W
Max screen dissipation
0.5 W
Max cathode current
18 mA

Published maximum ratings, characteristics, typical operation, rectifier data, and capacitances reviewed.

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

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage (ac/dc)

    7.2 volts

    Published value from supplied target entry

  • Heater Current

    0.3 ampere

    Published value from supplied target entry

  • Plate Voltage

    250 volts

    Published value from supplied target entry

  • Grid-No

    150 volts

    Published value from supplied target entry

  • Cathode Current

    18

    Published value from supplied target entry

  • Plate Dissipation

    2 watts

    Published value from supplied target entry

  • Grid-No

    0.5 watt

    Published value from supplied target entry

  • Plate Voltage

    170 volts

    Published value from supplied target entry

  • Grid-No

    160 volts

    Published value from supplied target entry

  • Voltage

    -1.2 volts

    Published value from supplied target entry

  • Amplification Factor

    17

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    0.35 megohm

    Published value from supplied target entry

  • Transconductance

    12000

    Published value from supplied target entry

  • Plate Current

    10 mA

    Published value from supplied target entry

  • Grid-No

    3.3 mA

    Published value from supplied target entry

  • amperes,

    11 amperes

    Published value from supplied target entry

  • Plate Voltage

    330 volts

    Published value from supplied target entry

  • Grid-No

    330 volts

    Published value from supplied target entry

  • Grid-No

    2

    Published value from supplied target entry

  • Plate Dissipation

    2.5 watts

    Published value from supplied target entry

  • For grid-No

    165 volts

    Published value from supplied target entry

  • For grid-No

    330 volts

    Published value from supplied target entry

  • Plate Voltage

    125 volts

    Published value from supplied target entry

  • Grid-No

    125 volts

    Published value from supplied target entry

  • Grid-No.l Voltage

    -1 volt

    Published value from supplied target entry

  • Amplification Factor

    40

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    150000 ohms

    Published value from supplied target entry

  • Transconductance

    10000

    Published value from supplied target entry

  • Plate Current

    12 mA

    Published value from supplied target entry

  • Grid-No.l-Circuit Resistance

    1 megohm

    Published value from supplied target entry

Other

  • Peak Heater-Cathode Voltage ±

    100 volts

    Published value from supplied target entry