Alternatives & variations Download PDF datasheet

25U4GT

High-current television damper rectifier for horizontal-deflection circuits, using a 25 V heater and providing energy-recovery service in series-heater receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 4GG
Socket code: IO
Base pins: 8
Nominal heater: 25 V / 300 mA

Description

Television damper diode; description derived from the supplied registration datasheet.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 4GG
Socket code: IO
Base pins: 8
Nominal heater voltage: 25 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

4GG - 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: 3850 V
Rectifier nominal output current: 125 mA
Rectifier peak forward current: 600 mA
Rectifier forward voltage drop: 21 V

Published source values promoted where applicable.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

Heater/filament voltage
25 V
Published heater/filament rating
Heater/filament current
300 mA
Published heater/filament rating
Tube voltage drop
21 V
At 250 mA DC

Other

DC output current
125 mA
TVDamperService
Peak inverse voltage
1250 V
TVDamperService
RMS supply voltage
350 V
TVDamperService
Peak current
600 mA
TVDamperService
TV damper peak inverse voltage
3850 V
TVDamperService
TV damper peak current
600 mA
TVDamperService