3DH3

Full-wave vacuum rectifier associated with the 3DG4/3DH3 documentation. Available source material identifies conventional full-wave rectification rather than explicit television flyback or EHT service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8MN
Socket code: IO
Base pins: 8
Nominal heater: 3.15 V / 480 mA

Description

A vacuum rectifier documented for television or power-supply service.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8MN
Socket code: IO
Base pins: 8
Nominal heater voltage: 3.15 V
Nominal heater current: 480 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8MN - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1IC	—	IC EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN2H	—	H — Heater EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN3IC	—	IC EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN4IC	—	IC EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN5IC	—	IC EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN6IC	—	IC EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN7IS	A	IS — Internal ScreenGroup 8MN7 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN7K	A	K — CathodeGroup 8MN7 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN7H	—	H — HeaterGroup 8MN7 EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
PIN8IC	—	IC EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN
CAP1P	A	P — Plate (Anode) EIA transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 130, 8MN

Section ratings

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 38000 V
Rectifier nominal output current: 2.2 mA
Rectifier peak forward current: 110 mA
Rectifier forward voltage drop: 25 V

Promoted from printed flyback-rectifier maximum ratings and average characteristics.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse voltage, DC component
30000 V
FlybackRectifierService
Heater voltage absolute maximum
3.65 V
Heater voltage absolute minimum
2.65 V
X-radiation output maximum
25 mR/hr
At published maximum-rated operating conditions

Capacitance

Plate to heater/cathode/internal shield capacitance
1.6 pF

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Hot-switching transient plate current per plate
6.6 A
FullWaveRectifier
AC plate-to-plate supply voltage
660 V
CapacitorInputFilter
Filter-input capacitance
40 uF
CapacitorInputFilter
DC output voltage at 350 mA
300 V
CapacitorInputFilter