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22DE4

Damper diode designed for television horizontal-deflection service, with ratings and operating characteristics suited to repetitive line-scan pulses.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 4CG
Socket code: IO
Base pins: 5
Nominal heater: 22.4 V / 450 mA

Description

22DE4 is a damper diode for television horizontal-deflection service. The supplied RCA manual excerpt was reviewed for heater data, physical sections, maximum ratings, electrical characteristics, capacitances, and stated operating conditions.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 4CG
Socket code: IO
Base pins: 5
Nominal heater voltage: 22.4 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

4CG - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
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
PIN3K	A	K — Cathode EIA chart transcription; independent manufacturer corroboration pending	Unverified EIA Base Connections, printed page 127, 4CG
PIN5P	A	P — 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: 6.5 W
Rectifier peak inverse voltage: 6500 V
Rectifier nominal output current: 165 mA
Rectifier peak forward current: 1.1 A
Rectifier forward voltage drop: 34 V
Rectifier max heater-cathode voltage: 5500 V
Rectifier warm-up time: 11 s

Abbreviated heater variant of THE6DE4; parent electrical table not available locally, so unsupported promoted values were not invented.

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

Maximum Plate Dissipation
6.5 W
DamperService
MaximumPeakHeaterCathodeVoltageNegative
5500 V
MaximumPeakHeaterCathodeVoltagePositive
300 V
Heater Warmup Time
11 s

Capacitance

PlateToHeaterAndCathodeCapacitance
8.5 pF
CathodeToHeaterAndPlateCapacitance
11.5 pF
Heater To Cathode Capacitance
4 pF

Data set 02

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse plate voltage
5000 V
DamperService
Steady state peak plate current
1100 mA
DamperService
DC output current
165 mA
DamperService
Peak heater-cathode voltage
5000 V
HeaterNegative
Heater warm-up time
11 s

Capacitance

Plate-to-heater-and-cathode capacitance
9.5 pF
Cathode-to-heater-and-plate capacitance
11.5 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

Characteristics

Heater voltage
22.4 V
Nominal heater rating from supplied sheet
Heater current
450 mA
Nominal heater rating from supplied sheet
Warm-up time
11 s
Average warm-up time from supplied sheet

Data set 04

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater Voltage (ac/dc) 6.3 17
22.4 V
Heater Voltage (ac/dc) 6.3 17 22.4 volts
Heater Current 1.6 0.6
450 mA
Heater Current 1.6 0.6 0.45 amperes
Heater Warm-up Time (Average) — 11
11 s
Heater Warm-up Time (Average) — 11 11 seconds
Peak Inverse Plate Voltage#
6500 V
Peak Inverse Plate Voltage# 6500 volts
Peak Plate Current
1100 mA
Peak Plate Current 1100 mA
Average Plate Current
180 mA
Average Plate Current 180 mA
Plate Dissipation
6.5 W
Plate Dissipation 6.5 watts
Tube Voltage Drop for plate current of
350 mA
Tube Voltage Drop for plate current of 350 mA 34 volts
# 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) 4.2
6.3 V
Heater Voltage (ac/dc) 4.2 6.3 volts
Heater Current 0.45
300 mA
Heater Current 0.45 0.3 ampere
Heater Warm-up Time (Average)
11 s
Heater Warm-up Time (Average) 11 seconds
Plate Voltage
330 V
Plate Voltage 330 volts
Grid-No. 3 (Suppressor-Grid) Voltage, Positive value
0 V
Grid-No. 3 (Suppressor-Grid) Voltage, Positive value 0 volts
Grid-No.2 (Screen-Grid) Supply Voltage
330 V
Grid-No.2 (Screen-Grid) Supply Voltage 330 volts
Grid-No. I (Control-Grid) Voltage, Positive-bias value
0 V
Grid-No. I (Control-Grid) Voltage, Positive-bias value 0 volts
Plate Dissipation
2.3 W
Plate Dissipation 2.3 watts
Peak inverse/negative-pulse plate voltage
6500 V
Published section value
Average output/plate current
180 mA
Published section value