1X2

Directly heated high-voltage rectifier for television flyback supplies. It rectifies horizontal-output transformer pulses to generate CRT accelerating voltage, using a low-power filament that operates at elevated potential.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9Y
Socket code: B9A
Base pins: 9
Nominal heater: 1.25 V / 200 mA

Description

Directly heated high-voltage television rectifier diode (1X2) for flyback service.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9Y
Socket code: B9A
Base pins: 9
Nominal heater voltage: 1.25 V
Nominal heater current: 200 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9Y - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1F1	—	F — Filament Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
PIN2F2	—	F — Filament Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
PIN3IC	—	IC Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
PIN4F1	—	F — Filament Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
PIN5F2	—	F — Filament Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
PIN6F1	—	F — Filament Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
PIN7IC	—	IC Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
PIN8F2	—	F — Filament Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
PIN9F1	—	F — Filament Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y
CAP1P	A	P — Plate (Anode) Transcribed from EIA chart; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9Y

Section ratings

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 15000 V
Rectifier nominal output current: 1 mA
Rectifier peak forward current: 10 mA
Rectifier forward voltage drop: 100 V

Directly heated half-wave high-voltage rectifier for television flyback supplies.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Maximum inverse voltage
15000 V
TVFlyback
Maximum DC output current
1 mA
TVFlyback
Maximum peak current
10 mA
TVFlyback

Characteristics

Forward voltage drop
100 V
TVFlyback; At 7 mA DC

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater voltage
1.25 V
Nominal
Heater current
200 mA
Nominal

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse voltage maximum
22000 V
FlybackRectifier
Average plate current maximum
0.5 mA
FlybackRectifier
Application
Television high-voltage rectifier
Section1