Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - TV Horizontal Output (sweep) ·BeamPower

21JZ6

Compactron beam-power pentode designed for television horizontal-deflection amplifier service and related power-amplifier operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
12GD
Socket code
B12C
Base pins
12
Nominal heater
21 V / 450 mA

Description

21JZ6 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
12GD
Socket code
B12C
Base pins
12
Nominal heater voltage
21 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

12GD - 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
9900 Ω
Transconductance
0.009 S
Amplification factor
4.8
Max plate voltage
770 V
Max screen voltage
220 V
Max plate dissipation
18 W
Max screen dissipation
3.5 W
Max cathode current
230 mA

Promoted characteristics use the published 130 V average-characteristics column; amplification factor is for triode connection. MaxPlateVoltage is the published DC plate-supply design maximum; pulse limits are parameters.

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

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

  • Snivet-control feature

    Separate grid3 facilitates suppression of high-frequency parasitics

Construction

  • Grid3 connection

    Separate external connection

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Peak Positive Pulse Plate Voltage

    6500 V

    HorizontalDeflection

  • Peak Negative Pulse Plate Voltage

    1500 V

    HorizontalDeflection

  • Peak Cathode Current

    800 mA

    HorizontalDeflection

  • Heater Warm-up Time

    11 s

Characteristic

  • Plate Current

    46 mA

    Plate=130V;Screen=130V;Grid1=-20V

  • Screen Current

    1.8 mA

    Plate=130V;Screen=130V;Grid1=-20V

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • amperes, 0.45; average warm-up time,

    11 s

    amperes, 0.45; average warm-up time, 11 seconds;

  • Plate Supply Voltage

    770 V

    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.3 Voltage, Positive-bias value

    70 V

    DC Grid-No.3 Voltage, Positive-bias value 70 volts

  • Grid-No.2 Voltage

    220 V

    Grid-No.2 Voltage 220 volts

  • DC Grid-No.l Voltage, Negative-bias value

    55 V

    DC Grid-No.l Voltage, Negative-bias value 55 volts

  • Peak Negative-Pulse Grid-No.l Voltage

    330 V

    Peak Negative-Pulse Grid-No.l Voltage 330 volts

  • Peak Cathode Current

    800 mA

    Peak Cathode Current 800 mA

  • Average Cathode Current

    230 mA

    Average Cathode Current 230 mA

  • Plate Dissipation*

    18 W

    Plate Dissipation* 18 watts

  • Grid-No.2 Input

    3.5 W

    Grid-No.2 Input 3.5 watts

  • Grid-No.l-Circuit Resistance

    1 Mohm

    Grid-No.l-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).

  • Maximum plate/supply voltage

    6500 V

    Published section value

  • Maximum screen-grid voltage

    770 V

    Published section value

  • Maximum plate dissipation

    18 W

    Published section value

Characteristic

  • Plate Voltage 13) 5000 50

    130 V

    Plate Voltage 13) 5000 50 130 volts

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

    130 V

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

  • Plate Resistance (Approx.) — — —

    9900 ohm

    Plate Resistance (Approx.) — — — 9900 ohms

  • Plate Current — — 450

    46 mA

    Plate Current — — 450 46 mA

  • Grid-No.2 Current — — 29

    1.8 mA

    Grid-No.2 Current — — 29 1.8 mA

  • current of

    1 mA

    current of 1.0 mA — —64 — —32 volts

  • Plate resistance

    9900 ohm

    Published section value

  • Amplification factor

    4.8

    Published section value