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Rectifier - TV Line Scan Boost ·Rectifier

DY51

Television EHT rectifier designed to rectify high-voltage flyback pulses for CRT acceleration. Rated for approximately 15 kV repetitive inverse voltage with very low average DC output and substantial short pulse current.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
WireLeaded
Socket code
B8D
Base pins
-
Nominal heater
1.4 V / 550 mA

Description

High-voltage rectifier diode for the EHT supply of portable television receivers.

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
WireLeaded
Socket code
B8D
Base pins
-
Nominal heater voltage
1.4 V
Nominal heater current
550 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

WireLeaded - 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
18000 V
Rectifier nominal output current
0.35 mA
Rectifier peak forward current
40 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

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Output Current

    350 uA

  • Peak Anode Current

    40 mA

    PulseDuration<=10us

  • Maximum Reservoir Capacitance

    2000 pF

  • Peak Inverse Voltage

    15000 V

  • Nominal Output Current

    0.35 mA

  • Peak Forward Current

    40 mA

  • Interelectrode Capacitance Data Published

    1

    SourceTablePresent

Capacitance

  • Anode Cathode Capacitance

    0.8 pF

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 voltage Vg

    1.4 V

  • Heater current It

    550 mA

  • Anode voltage, negative peak ‘Vap max

    - to 15 kV

    Maximum

  • Anode voltage, negative peak (abs. max.) ‘Vap max

    - to 18 kV

    Maximum

  • Anode current, peak Iap max

    - to 40 mA

    Maximum

Capacitance

  • Anode to all Ca

    0.8 pF

  • Heater voltage (I3 <

    - to 200 uA

    Maximum

  • Heater voltage (Ia >

    - to 200 uA

    Maximum

  • 1) Max. duration is 10 % of a line-scanning cycle, but max

    - to 10 usec

    Maximum

Characteristic

  • Anode voltage Va

    100 V

  • Anode current I

    13 mA

Data set 04

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Typical anode voltage

    100 V

  • Typical anode current

    13 mA

  • Filter input capacitance maximum

    2000 pF

  • Negative peak anode voltage design-centre

    15 kV

  • Average anode current maximum

    350 uA

  • Peak anode current maximum

    40 mA