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Rectifier - TV Line Scan Boost ·Rectifier

DY86

Dedicated television high-voltage flyback rectifier for generating CRT accelerating voltage from horizontal-output transformer pulses. Its directly heated filament operates at the elevated EHT output potential.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
NOVAL
Socket code
B9A
Base pins
9
Nominal heater
1.4 V / 550 mA

Description

High-voltage half-wave rectifier for television flyback EHT supplies.

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
550 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
22000 V
Rectifier nominal output current
0.5 mA
Rectifier peak forward current
40 mA

Pulse service ratings include 22 kV inverse voltage, 800 uA rectified current and 40 mA peak current.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

  • Heater voltage

    1.4 V

    Published nominal value

  • Heater current

    530 mA

    Published nominal value

Other

  • Peak inverse voltage

    22000 V

    Published rectifier limit

Data set 02

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Output Current

    500 uA

    PulsedInput

  • Peak Anode Current

    40 mA

    PulseDuration<=10us

  • Maximum Reservoir Capacitance

    2000 pF

  • Peak Inverse Voltage

    22000 V

  • Nominal Output Current

    0.5 mA

  • Peak Forward Current

    40 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

Capacitance

  • Anode to Heater-Cathode-Strap Capacitance

    1.55 pF

Data set 03

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Heater voltage Vi

    1.4 V

  • Heater current I¢

    550 mA

  • age can be adjusted to

    1.4 V

  • current of

    200 A

  • Output voltage Vo max

    - to 18 kV

    Maximum

  • Peak inverse voltage Va invp max

    - to 22 kv

    Maximum

  • (Absolute max.) Va invy, max

    - to 27 kv

    Maximum

  • Peak inverse voltage without current Vga invp(lo = 0) max

    - to 24 kv

    Maximum

  • Output current Iy max

    - to 0.5 mA

    Maximum

  • Peak output current Iap max

    - to 40 mA

    Maximum

Capacitance

  • Anode to all Ca

    1.55 pF

  • 2y During short periods as in television service I = max

    - to 0.8 mA

    Maximum

Characteristic

  • Output current I

    0.15 mA

  • Output voltage Vo

    18 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

    550 mA

    Nominal

  • Maximum Peak Inverse Voltage

    22000 V

  • Rectified Output Current

    0.5 mA

  • PeakForwardCurrent

    40 mA

  • XRayShieldingAdvisedAbovePIV

    16000 V

    Published X-ray shielding note

Data set 05

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Capacitance

  • Anode to all capacitance

    1.55 pF

    WithoutExternalShield

Other

  • Typical DC output current

    0.15 mA

  • Typical DC output voltage

    18000 V

  • Maximum DC output voltage

    18000 V

  • Maximum peak inverse voltage

    22000 V

    DesignCentre

  • Absolute maximum peak inverse voltage

    27000 V

    AbsoluteMaximum

  • Maximum average output current

    0.5 mA

  • Maximum peak output current

    40 mA

    PulseRated

  • Maximum filter input capacitance

    2000 pF

  • Maximum peak inverse voltage without output current

    24000 V

    Io=0

  • Short-period output current

    0.8 mA

    TelevisionService

  • Peak-current pulse duration maximum

    10 us

    Duty<=10%LineCycle