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Rectifier - TV Line Scan Boost ·Rectifier

DY802

High-voltage half-wave rectifier specifically for television flyback/EHT supplies, converting horizontal-output transformer pulses into CRT accelerating voltage with a filament designed to operate at elevated potential.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
NOVAL
Socket code
B9A
Base pins
9
Nominal heater
1.4 V / 600 mA

Description

High-voltage rectifier diode for approximately 20 kV EHT supplies in 110-degree monochrome television receivers.

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
NOVAL
Socket code
B9A
Base pins
9
Nominal heater voltage
1.4 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

NOVAL - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
30000 V
Rectifier nominal output current
0.5 mA
Rectifier peak forward current
50 mA

Source-published values promoted where directly stated; additional values retained in parameter table.

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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Peak Inverse Voltage

    25000 V

    FlybackPulse

  • DC Output Current

    0.8 mA

  • Peak Current

    50 mA

    FlybackPulse

Data set 02

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Application

  • Application

    TelevisionEHTRectifier text

Data set 03

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Heater current Ig

    600 mA

  • current of

    200 uA

  • Output voltage Vo max

    - to 20 kV

    Maximum

  • Peak inverse voltage Vainvp max

    - to 25 kv

    Maximum

  • peak Iop max

    - to 50 mA

    Maximum

Capacitance

  • Anode to all Ca

    1 pF

  • 2) During short periods as in TV operation I = max

    - to 800 uA

    Maximum

Characteristic

  • Output current I

    200 uA

  • Output voltage Vo

    20 kv

Data set 04

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • HeaterVoltageNominal

    1.4 V

    Nominal

  • HeaterCurrentNominal

    600 mA

    Nominal

  • Maximum Peak Inverse Voltage

    30000 V

  • Rectified Output Current

    0.5 mA

  • PeakForwardCurrent

    50 mA

  • DesignCentrePeakInverseVoltage

    25000 V

    Normal television flyback EHT operation

Data set 05

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Capacitance

  • Anode to all capacitance

    1 pF

Other

  • Typical DC output current

    0.2 mA

  • Typical DC output voltage

    20000 V

  • Maximum DC output voltage

    20000 V

  • Maximum peak inverse voltage

    25000 V

    DesignCentre

  • Absolute maximum peak inverse voltage

    30000 V

    AbsoluteMaximum

  • Maximum average output current

    0.5 mA

  • Maximum peak output current

    50 mA

    PulseRated

  • Maximum filter input capacitance

    3000 pF

  • Short-period output current

    0.8 mA

    TelevisionService

  • Peak-inverse pulse duration maximum

    18 us

    Duty<=22%LineCycle