Alternatives & variations Download PDF datasheet

6DM4A

Improved indirectly heated half-wave damper rectifier with higher plate-current capability for television horizontal-deflection service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 4CG
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 1.2 A

Description

The 6DM4A is an indirectly heated half-wave rectifier for television damper service, with higher plate-current ratings than the 6DM4.

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: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 1.2 A
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: 5000 V
Rectifier nominal output current: 200 mA
Rectifier peak forward current: 1.2 A
Rectifier forward voltage drop: 35 V
Rectifier max heater-cathode voltage: 900 V
Rectifier warm-up time: 11 s

Published Westinghouse maximum ratings, characteristics, pulse/deflection values, capacitances, and typical operating conditions promoted where applicable; additional values retained as 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

Rectifier

Other

Peak inverse voltage
5000 V
Peak plate current
1200 mA
DC plate current
200 mA

Capacitance

Heater-to-cathode capacitance
4 pF
Plate-to-cathode/heater capacitance
8.5 pF

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse voltage maximum
5000 V
DC plate current maximum
200 mA
Heater-cathode voltage maximum
900 V

Application

Application
Television horizontal-deflection damping diode

Data set 03

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
DamperService
Peak plate current
1200 mA
DamperService
DC output current
200 mA
DamperService

Characteristics

Tube voltage drop
35 V
PlateCurrent=400mA

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
16.8 V
Published in approved 17DM4A target datasheet entry; Section1
Heater Current 1.2
450 mA
Published in approved 17DM4A target datasheet entry; Section1
Heater Warm-up Time (Average)
11 seconds
Published in approved 17DM4A target datasheet entry; Section1
Peak Inverse Plate Voltage*
6000 V
Published in approved 17DM4A target datasheet entry; Section1
Peak Plate Current +100
1200 mA
Published in approved 17DM4A target datasheet entry; Section1
+300
200 mA
Published in approved 17DM4A target datasheet entry; Section1
Plate Dissipation
6.5 W
Published in approved 17DM4A target datasheet entry; Section1
Peak value
-5000 V
Published in approved 17DM4A target datasheet entry; Section1
Average value
-900 V
Published in approved 17DM4A target datasheet entry; Section1
# Pulse duration must not exceed 15% of a horizontal scanning cycle (
10 microseconds
Published in approved 17DM4A target datasheet entry; Section1