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Power - TV Vertical Output ·Triode-Triode

19EW7

Dissimilar dual triode for television vertical oscillator and deflection amplifier.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: 9
Nominal heater: 18.9 V / 300 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: 9
Nominal heater voltage: 18.9 V
Nominal heater current: 300 mA
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

2 physical sections, each with unique specifications.

Section 0

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 8750 Ω
Transconductance: 0.002 S
Amplification factor: 17.5
Max plate voltage: 330 V

Oscillator triode; typical Va 250 V, Vg -11 V, Ia 5.5 mA.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 800 Ω
Transconductance: 0.0075 S
Amplification factor: 6
Max plate voltage: 330 V
Max plate dissipation: 10 W
Max cathode current: 50 mA

Vertical output triode; typical Va 150 V, Vg -17.5 V, Ia 45 mA; 1500 V peak positive plate pulse, 175 mA peak cathode 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

1970 Sylvania Technical Manual

Published operating points and test conditions from this source.

SECTION 0

Triode

Characteristic

Plate Voltage 250
250 V
Oscillator triode typical plate voltage
—11
-11 V
Oscillator triode typical grid voltage
5.5
5.5 mA
Oscillator triode typical plate current

Other

Heater/filament voltage
18.9 V
19EW7 heater nominal voltage
Heater/filament current
300 mA
Heater current

SECTION 1

Triode

Characteristic

Plate Voltage 250
150 V
Vertical amplifier triode typical plate voltage
—11
-17.5 V
Vertical amplifier triode typical grid voltage
5.5
45 mA
Vertical amplifier triode typical plate current