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Power - TV Horizontal Output (sweep) ·Pentode

EL300

High-power output pentode designed specifically for television horizontal line-deflection, providing substantial current and flyback-voltage capability for magnetic line-output stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: 8
Nominal heater: 6.3 V / 1.65 A

Description

High-power line/horizontal-deflection pentode for television sweep service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 1.65 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 plate voltage: 550 V
Max screen voltage: 275 V
Max plate dissipation: 17.6 W
Max screen dissipation: 5 W

Published ratings/characteristics promoted from source tables.

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 filAmeEnt …………ucesesesersecseneuseseececençeseensenco VÊ
6.3 V
Heater current .….……ucecseeserenenmnenennsnnnnnnasnnnn T
1.65 A
Plate voltage à courant nuUl …………ssenserseneeseansesesnee
550 V
Tension Continue d'anod@ ……s
275 V
Tension de crête positive d'anode (1) ……s es
7500 V
Tension de crête négative d'anode (1) ……s
1500 V
Screen-grid voltage à courant nul
550 V
Tension continue de grille n° 2 _.……msermerrsesnesenancess
275 V
Tension de crête négative de grille n° 1 (1)
300 V
Courant de crête de cathode
700 mA
Dissipation d'ANOdE ….….ssersreraveseessassenensessresamnesansecnes
17.6 W
Screen-grid dissipation
5 W
filament négatif par rapport à la cathode
250 V
filament positif par rapport à la cathode
220 V
Résistance du circuit de grille n 1
2.2 MΩ
Température de l'ampoule au point le plus chaud(2)
225 °C
Tension de grille n°2 … . V 130 170 100
170 V
Tension de grille n° 1 …… VE 0 -6,5 Rk=50 ©
-150 V
Courant d'Aanod@ ……c IA 495 465
0.04 mA
tensions d'anode de 100 V, de grille n° 2 de 190 V et de grille n° 1 de
0 V
de crête ne dépassant pas 570 mA pour des tensions d'anode de
100 V
grille n° 2 de 190 V et de grille n° 1 de
0 V
Vo, =
70 V

Characteristic

Capacitance grille n° 1/ anod® .………iwereremienenes C8,/ à
0.5 pF
InterelectrodeCapacitance
Capacitance d'Entré@ _.uerereimemeressenensenenseassssnsnsü CE
25 pF
InterelectrodeCapacitance
Capacitance d@€ SOrbiE L...…resscosensesrarseunsécsensemsmsesessenmes CS
11 pF
InterelectrodeCapacitance