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Rectifier - Damper Diode ·Rectifier

12AX4GTB

High-voltage television horizontal-deflection damper diode with approximately 5 kV peak-inverse capability, high pulse current, and controlled heater warm-up.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
4CG
Socket code
-
Base pins
8
Nominal heater
12.6 V / 600 mA

Description

High-voltage damper diode for television horizontal-deflection service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
4CG
Socket code
-
Base pins
8
Nominal heater voltage
12.6 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

4CG - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1IC—IC

EIA chart transcription; independent manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 4CG

PIN2IC—IC

EIA chart transcription; independent manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 4CG

PIN3KAK — Cathode

EIA chart transcription; independent manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 4CG

PIN5PAP — Plate (Anode)

EIA chart transcription; independent manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 4CG

PIN7H—H — Heater

EIA chart transcription; independent manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 4CG

PIN8H—H — Heater

EIA chart transcription; independent manufacturer corroboration pending

Unverified

EIA Base Connections, printed page 127, 4CG

Section ratings

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances
Max plate dissipation
5.3 W
Rectifier peak inverse voltage
5000 V
Rectifier nominal output current
165 mA
Rectifier peak forward current
1 A
Rectifier forward voltage drop
32 V
Rectifier max heater-cathode voltage
5000 V
Rectifier warm-up time
11 s

Damper rectifier; voltage drop specified at 250 mA.

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

Rectifier

Other

  • Service

    Television damper diode

Data set 02

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Peak inverse plate voltage

    5000 V

    TVDamperService

  • Plate dissipation

    5.3 W

    TVDamperService

  • Steady state peak plate current

    1000 mA

    TVDamperService

  • DC output current

    165 mA

    TVDamperService

  • Heater warm-up time

    11 s

Characteristic

  • Tube voltage drop at 250 mA

    32 V

    TVDamperService

Capacitance

  • Cathode-to-plate-and-heater capacitance

    8.5 pF

  • Plate-to-cathode-and-heater capacitance

    5 pF

  • Heater-to-cathode capacitance

    4 pF

Data set 03

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Peak inverse plate voltage

    5000 V

    DamperService

  • Peak plate current

    1000 mA

    DamperService

  • DC plate current

    165 mA

    DamperService

  • Plate dissipation

    5.3 W

    DamperService

Characteristics

  • Tube voltage drop at 250 mA

    32 V

    DamperService

  • Heater voltage nominal

    12.6 V

  • Heater current

    600 mA

  • Heater warm-up time

    11 s

    Average

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Heater Voltage (ac/dc)

    16.8

    Published value from supplied target entry

  • Heater Current

    0.45 amperes

    Published value from supplied target entry

  • Heater Warm-up Time (Average)

    11 seconds

    Published value from supplied target entry

  • Peak Inverse Plate Voltage#

    5000 volts

    Published value from supplied target entry

  • Peak Plate Current

    1000 mA

    Published value from supplied target entry

  • Average Plate Current

    165 mA

    Published value from supplied target entry

  • Plate Dissipation

    5.3 watts

    Published value from supplied target entry

  • Tube Voltage Drop for plate current of

    32 mA

    Published value from supplied target entry

  • Peak Inverse Plate Voltage

    1250 volts

    Published value from supplied target entry

  • Peak Plate Current (Per Plate)

    375 mA

    Published value from supplied target entry

  • Peak Heater-Cathode Voltage ±

    450 volts

    Published value from supplied target entry

  • AC Plate-to-PIate Supply Voltage (rms)

    900 volts

    Published value from supplied target entry

  • i„„j current

    395 mA

    Published value from supplied target entry

  • Half-load to full-load current

    50 volts

    Published value from supplied target entry

  • AC Plate-to-Plate Supply Voltage (rms)

    900 volts

    Published value from supplied target entry

  • a* u „j current, ofr

    270 mA

    Published value from supplied target entry

Capacitance

  • Cathode to Plate and Heater

    8.5 pF

    Published value from supplied target entry

  • Plate to Cathode and Heater

    5 pF

    Published value from supplied target entry

  • Heater to Cathode

    4 pF

    Published value from supplied target entry

  • Filter Input Capacitor'

    10

    Published value from supplied target entry