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Power - TV Horizontal Output (sweep) ·BeamPower

25E5

Indirectly heated high-current output pentode designed specifically for television line-output service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
25 V / 300 mA

Description

Indirectly heated high-current output pentode for television line-output service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
25 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

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Transconductance
0.011 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
10 W
Max screen dissipation
5 W
Max cathode current
200 mA

Published Ferranti ratings and characteristics promoted from the supplied source.

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

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • HeaterOrFilamentVoltage

    25 V

  • HeaterOrFilamentCurrent

    300 mA

Other

  • PeakPositiveAnodeVoltage

    7000 V

    LineOutput

  • PeakNegativeAnodeVoltage

    1500 V

    LineOutput