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Power - TV Horizontal Output (sweep) ·Pentode

EL502

High-current power pentode designed for television horizontal line-deflection amplification and repetitive flyback pulse service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 1.7 A

Description

Power pentode for television line-deflection amplification. Indirectly heated Mazda/Belvu receiving tube; descriptive text translated to English from the French source.

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
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
1.7 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

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

Pentode

X-ray radiationInterelectrode capacitances
Max screen dissipation
4.5 W

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 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Tension filament …..……..….useseencemseensenenens VÊ

    6.3 V

  • Courant filament ……..…..….……ccesesercerseneneseensenc Tf

    1.7 A

  • Tension d'anode à courant nul …… …… Va bl

    550 V

  • Tension continue d'Anode …..…..…….eensereresscernercnences V

    250 V

  • Tension de crête positive d'anode (1) veosescersceunss VA CI 7

    500 V

  • Tension de crête négative d'anode (1).......................…—Va er 1

    500 V

  • Tension de grille n° 2 à courant nul ……c VEz bl

    550 V

  • Tension continue de grille n° 2 …...…eosevecococrosesrseues VB

    250 V

  • Tension de crête négative de gnllene 1 (1)....….……………-Vg,er

    300 V

  • Courant moyen de€ CAtNOdC ... csucenceenencemensessencerces TK

    250 mA

  • Courant de crête de Cathod@ …… ……cmerseecrserscemerce… 1K CT

    700 mA

  • Dissipation d'anod@ ...c srrssceserceenencsenserreaceune PA

    20 W

  • Dissipation de grille n° 2 _..………rcosreronsres vovarsenencecssccsse PEa

    4.5 W

  • filament négatif par rapport à la cathode …… -Vfk

    250 V

  • filament positif par rapport à la cathode ………… Vfk

    220 V

Characteristic

  • Capacité d'entrée ….…..……uueersereneseneenenns C

    29 pF

  • Capacité de SOrtie …..…..…………ureneensersensenemens OS

    11 pF

  • Tension de grille n° 2 …… Ve 170 100

    170 V

  • Tension de grille n° 1 …… Ve: -6,5 | Rk=500

    -150 V

  • Courant d'anod@ …....…sesreeencececs T 465

    0.04 mA

  • Pour un tube neuf moyen, le courant d'anode de crête est de

    835 mA

  • courant d'anode de crête ne dépassant pas

    600 mA

  • lg2 Va2 =

    190 V

  • 40$—

    -20 V

  • la Vg,=

    150 V

  • [2 Vg2 =

    150 V