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SV8113

Very-low-mu Svetlana 811-family directly heated power triode. Rated around 800 V and 65 W dissipation, its amplification factor near 3.5 emphasizes high-current operation for specialized audio-output and linear power stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: UX4
Base pins: 4
Nominal heater: 6.3 V / 4 A

Description

Power triode, medium 4-pin base. Thoriated-tungsten filament, hard glass

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: UX4
Base pins: 4
Nominal heater voltage: 6.3 V
Nominal heater current: 4 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

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 2000 Ω
Transconductance: 0.0017 S
Amplification factor: 3.5
Max plate voltage: 800 V
Max plate dissipation: 65 W
Max grid dissipation: 50 W
Max cathode current: 160 mA

Published ratings/characteristics promoted where unambiguous.

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

199X Svetlana

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Voltage (AC or DC) 6.3 ±
0.3 V
SourcePage1-2
Current
4 A
SourcePage1-2
Plate resistance
2000 ohms
SourcePage1-2
Grid to plate
8 pF
SourcePage1-2
Grid to filament
7 pF
SourcePage1-2

Other

DC plate voltage
800 V
SourcePage1-2
Maximum-signal DC plate current
160 mA
SourcePage1-2
Grid Current
50 mA
SourcePage1-2
DC plate voltage 450 800
450 V
TypicalOperation
Grid voltage -65 -165
-65 V
TypicalOperation
Peak grid drive 130 30
280 V
TypicalOperation
DC plate current, zero signal 80 80
80 mA
TypicalOperation
DC plate current, max signal 83 90
105 mA
TypicalOperation
Plate load resistance 5000 5000
5000 Ohms
TypicalOperation
Power output at distortion above 3.2 15.4
12.4 W
TypicalOperation
DC plate voltage 450 750
750 V
TypicalOperation
Grid voltage -80 -178
-178 V
TypicalOperation
Peak grid drive, grid to grid 328 720
880 V
TypicalOperation
DC plate current, zero signal 150 150
150 mA
TypicalOperation
DC plate current, max signal 155 215
238 mA
TypicalOperation
Plate load resistance 9600 9600
9600 Ohms
TypicalOperation
Power output at distortion above 10 49
66 W
TypicalOperation