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Power - TV Horizontal Output (sweep) ·BeamPower

21LG6A

High-pulse beam-power tube intended for television horizontal-deflection circuits, with multi-kilovolt plate-pulse ratings and limits defined by horizontal scanning-cycle duration.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B12C
Base pins
-
Nominal heater
22.4 V / 460 mA

Description

21LG6A is a beam-power tube for television deflection or power-amplifier service. The supplied RCA manual excerpt was reviewed for heater data, physical sections, maximum ratings, electrical characteristics, capacitances, and stated operating conditions.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B12C
Base pins
-
Nominal heater voltage
22.4 V
Nominal heater current
460 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

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
7500 Ω
Max plate voltage
7600 V
Max screen voltage
900 V
Max plate dissipation
28 W
Max cathode current
1.1 A

BeamPower section; ratings and characteristics promoted where clearly attributable.

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

Beam Power

Other

  • Grid-No.l-Circuit Resistance, for horizontal-deflection circuit

    2.2 Mohm

    Grid-No.l-Circuit Resistance, for horizontal-deflection circuit 2.2 megohms

  • # Pulse duration must not exceed 22% of a horizontal scanning cycle (

    18 us

    # Pulse duration must not exceed 22% of a horizontal scanning cycle (18 microseconds)

  • DC Plate Supply Voltage

    900 V

    DC Plate Supply Voltage 900 volts

  • Peak Positive-Pulse Plate Voltage*

    7600 V

    Peak Positive-Pulse Plate Voltage* 7600 volts

  • Peak Negative-Pulse Plate Voltage

    100 V

    Peak Negative-Pulse Plate Voltage 100 volts

  • Grid-No.2 Voltage

    250 V

    Grid-No.2 Voltage 250 volts

  • Grid-No. 1 Voltage, Negative-bias value

    300 V

    Grid-No. 1 Voltage, Negative-bias value 300 volts

  • Plate Dissipation"

    28 W

    Plate Dissipation" 28 watts

  • Average Cathode Current

    315 mA

    Average Cathode Current 315 mA

  • Peak Cathode Current

    1100 mA

    Peak Cathode Current 1100 mA

  • With feedback type high voltage regulation

    1.8 Mohm

    With feedback type high voltage regulation 1.8 megohms

  • With shunt-type high voltage regulation (switching mode)

    2.2 Mohm

    With shunt-type high voltage regulation (switching mode) .... 2.2 megohms

  • # Pulse duration must not exceed 15% of a horizontal scanning cycle (

    10 us

    # Pulse duration must not exceed 15% of a horizontal scanning cycle (10 microseconds).

  • Heater Voltage (ac/dc) 16.8

    22.4 V

    Heater Voltage (ac/dc) 16.8 22.4 volts

  • Heater Current 0.6

    460 mA

    Heater Current 0.6 0.46 ampere

  • Heater Warm-up Time 11

    11 s

    Heater Warm-up Time 11 11 seconds

  • Peak Inverse Plate Voltage#

    5000 V

    Peak Inverse Plate Voltage# 5000 volts

  • Peak Plate Current

    1100 mA

    Peak Plate Current 1100 mA

  • Average Plate Current

    175 mA

    Average Plate Current 175 mA

  • Plate Dissipation

    6.5 W

    Plate Dissipation 6.5 watts

  • Maximum plate/supply voltage

    7600 V

    Published section value

  • Maximum screen-grid voltage

    900 V

    Published section value

Characteristic

  • Plate Voltage 125 6000 50

    175 V

    Plate Voltage 125 6000 50 175 volts

  • Grid-No.2 (Screen-Grid) Voltage

    125 V

    Grid-No.2 (Screen-Grid) Voltage .... 125 125 125 125 volts

  • Grid-No.l (Control-Grid) Voltage —25 0 —

    23 V

    Grid-No.l (Control-Grid) Voltage —25 0 —23 volts

  • Plate Resistance (Approx.)

    7500 ohm

    Plate Resistance (Approx.) 7500 ohms

  • Plate Current 600

    90 mA

    Plate Current 600 90 mA

  • Grid-No.2 Current 42

    1.7 mA

    Grid-No.2 Current 42 1.7 mA

  • current of

    1 mA

    current of 1 mA —45 volts

  • Tube Voltage Drop for plate current of

    350 mA

    Tube Voltage Drop for plate current of 350 mA 32 volts

  • # Pulse duration must not exceed 15% of one horizontal scanning cycle (

    10 us

    # Pulse duration must not exceed 15% of one horizontal scanning cycle (10 microseconds).

  • Plate resistance

    7500 ohm

    Published section value