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Power - TV Horizontal Output (sweep) ·BeamPower

21GY5

Compactron beam-power pentode designed for television horizontal-deflection and related power-amplifier service, electrically related to 6GY5 except for heater characteristics.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9E
Base pins
12
Nominal heater
21 V / 450 mA

Description

21GY5 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

Novar 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9E
Base pins
12
Nominal heater voltage
21 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

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
18000 Ω
Transconductance
0.0091 S
Amplification factor
4.4
Max plate voltage
770 V
Max screen voltage
220 V
Max plate dissipation
17.5 W
Max screen dissipation
3.5 W
Max cathode current
230 mA
Rectifier max heater-cathode voltage
200 V
Rectifier warm-up time
11 s

Reference/equivalence-only source: electrical ratings/characteristics are not reproduced; missing promoted values intentionally not inferred from the external 6GY5 datasheet.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Peak Cathode Current

    800 mA

    HorizontalDeflection

Characteristic

  • Transconductance

    9100 uS

    Typical

Data set 02

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

  • Heater voltage

    21 V

  • Heater current

    450 mA

  • Transconductance

    7500 uS

Other

  • DC plate supply voltage maximum

    770 V

  • Peak positive plate voltage maximum

    6500 V

    Pulse

  • Peak negative pulse plate voltage maximum

    -1500 V

    Pulse

  • Plate dissipation maximum

    17.5 W

  • DC grid2 voltage maximum

    220 V

  • Grid2 dissipation maximum

    3.5 W

Application

  • Application

    Television horizontal-deflection output amplifier

Data set 03

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • DC plate-supply voltage

    550 V

    HorizontalDeflection

  • Peak positive pulse plate voltage

    6500 V

    HorizontalDeflection

  • Peak negative pulse plate voltage

    -1500 V

    HorizontalDeflection

  • Maximum grid #2 voltage

    175 V

    HorizontalDeflection

  • Peak negative grid #1 voltage

    -300 V

    HorizontalDeflection

  • Average cathode current

    110 mA

    HorizontalDeflection

  • Peak cathode current

    400 mA

    HorizontalDeflection

  • Plate voltage

    250 V

    AverageCharacteristics

  • Grid #2 voltage

    150 V

    AverageCharacteristics

  • Plate current

    65 mA

    AverageCharacteristics

  • Grid #2 current

    1.8 mA

    AverageCharacteristics

Characteristic

  • Plate resistance

    18000 ohm

    AverageCharacteristics

  • Transconductance

    7300 uS

    AverageCharacteristics

  • Triode amplification factor

    4.3

    TriodeConnection

Capacitance

  • Grid #1-to-plate capacitance

    0.7 pF

  • Input capacitance

    16 pF

  • Output capacitance

    7 pF

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater Voltage

    21 V

  • Heater Current

    450 mA

  • Heater Warm-up Time

    11 s

Data set 05

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Plate Voltage 5000 60 130

    130 V

    Plate Voltage 5000 60 130 130 volts

  • Grid-No.2 (Screen-Grid) Voltage 130 130 130

    130 V

    Grid-No.2 (Screen-Grid) Voltage 130 130 130 130 volts

  • Grid-No.2 Current —24**

    1.75 mA

    Grid-No.2 Current —24** 1.75 mA

  • Plate Supply Voltage

    150 V

    Plate Supply Voltage 150 volts

  • Grid-No.3 Supply Voltage

    0 V

    Grid-No.3 Supply Voltage 0 volts

  • Grid-No.2 Supply Voltage

    100 V

    Grid-No.2 Supply Voltage 100 volts

  • Grid-No.l Supply Voltage

    0 V

    Grid-No.l Supply Voltage 0 volts

  • Plate Resistance (Approx.)

    0.14 Mohm

    Plate Resistance (Approx.) 0.14 megohm

  • Transconductance, Grid No.3 to Plate

    750 uS

    Transconductance, Grid No.3 to Plate 750 /imhos

  • Plate Current

    3.7 mA

    Plate Current 3.7 mA

  • Grid-No.3 Supply Voltage (Approx.) for plate current of 20 /lA —3

    7 V

    Grid-No.3 Supply Voltage (Approx.) for plate current of 20 /lA —3 7 volts

  • Heater voltage

    6.3 V

    Rated heater condition

  • Amplification factor

    0

    Published section value

Other

  • DC Plate Supply Voltage

    770 V

    DC Plate Supply Voltage 770 volts

  • Peak Positive-Pulse Plate Voltage#

    6500 V

    Peak Positive-Pulse Plate Voltage# 6500 volts

  • Peak Negative-Pulse Plate Voltage

    1500 V

    Peak Negative-Pulse Plate Voltage 1500 volts

  • DC Grid-No.2 Voltage

    220 V

    DC Grid-No.2 Voltage 220 volts

  • DC Grid-No.l Voltage —

    55 V

    DC Grid-No.l Voltage —55 volts

  • Grid-No.2 Input

    3.5 W

    Grid-No.2 Input 3.5 watts

  • Grid-No. 1-Circuit Resistance

    1 Mohm

    Grid-No. 1-Circuit Resistance 1 megohm

  • # 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)

    6.3 V

    Heater Voltage (ac/dc) 6.3 volts

  • Heater Current

    450 mA

    Heater Current 0.45 ampere

  • Heater Warm-up Time (Average)

    11 s

    Heater Warm-up Time (Average) 11 seconds

  • Plate Voltage

    300 V

    Plate Voltage 300 volts

  • Peak Positive-Pulse Plate Voltage*

    600 V

    Peak Positive-Pulse Plate Voltage* 600 volts

  • Grid-No.2 (Screen-Grid) Supply Voltage

    300 V

    Grid-No.2 (Screen-Grid) Supply Voltage 300 volts

  • Plate Dissipation 1

    -7 W

    Plate Dissipation 1-7 watts

  • For grid-No.2 voltages up to

    150 V

    For grid-No.2 voltages up to 150 volts 1 watt

  • For grid-No.2 voltages between 150 and

    300 V

    For grid-No.2 voltages between 150 and 300 volts

  • Maximum plate/supply voltage

    6500 V

    Published section value

  • Maximum screen-grid voltage

    770 V

    Published section value