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Voltage Radio Detector Converter ·Pentode-Triode

LCF80

Miniature triode-pentode used for frequency-changing service in television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6 V / 450 mA

Description

Miniature type used in frequency-changer service in television receivers. Outlines section, 6B; requires 9DC miniature 9-contact socket. : : 362 RCA Receiving Tube Manual

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 V
Nominal heater current
450 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
400000 Ω
Transconductance
0.0062 S
Amplification factor
20
Max plate dissipation
1.7 W
Max cathode current
14 mA

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

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Max plate dissipation
1.2 W

Published ratings, characteristics, typical operation, rectifier/regulator 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)

    6 volts

    Published value from supplied target entry

  • Heater Current

    0.45 ampere

    Published value from supplied target entry

  • Plate Supply Voltage

    550 volts

    Published value from supplied target entry

  • Plate Voltage

    250 volts

    Published value from supplied target entry

  • Grid-No

    550 volts

    Published value from supplied target entry

  • Grid-No

    2

    Published value from supplied target entry

  • With cathode current of

    175 mA

    Published value from supplied target entry

  • With cathode current less than

    200 mA

    Published value from supplied target entry

  • Cathode Current

    14 mA

    Published value from supplied target entry

  • Plate Dissipation

    1.7 watts

    Published value from supplied target entry

  • With plate dissipation greater than

    0.5 watts

    Published value from supplied target entry

  • With plate dissipation less than

    0.75 watts

    Published value from supplied target entry

  • Plate Voltage

    170 volts

    Published value from supplied target entry

  • Grid-No

    170

    Published value from supplied target entry

  • Grid-No

    -2 volts

    Published value from supplied target entry

  • Amplification Factor

    20

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    0.4 megohm

    Published value from supplied target entry

  • Transconductance

    6200

    Published value from supplied target entry

  • Plate Current

    10 mA

    Published value from supplied target entry

  • Grid-No

    2.8 mA

    Published value from supplied target entry

  • Input Resistance at frequency of

    0.01 megohm

    Published value from supplied target entry

  • Grid-No

    1

    Published value from supplied target entry

  • Heater Voltage (ac/dc)

    10.9 volts

    Published value from supplied target entry

  • Heater Warm-up Time

    11 seconds

    Published value from supplied target entry

Other

  • Peak Heater-Cathode Voltage ±

    100 volts

    Published value from supplied target entry

Capacitance

  • Grid to Plate

    2.8 pF

    Published value from supplied target entry

  • Plate to Cathode, Heater, Grid No

    3

    Published value from supplied target entry

  • Triode Grid to Pentode Plate

    0.015 pF

    Published value from supplied target entry

  • Pentode Plate to Triode Plate

    0.17 pF

    Published value from supplied target entry