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SV5723

Svetlana low-mu directly heated audio power triode with thoriated-tungsten filament. Rated around 1 kV and 125 W dissipation, its very low amplification factor emphasizes high-current linear audio-output service.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

C,, LOW-MU AUDIO POWER TRIODE

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: 1900 Ω
Transconductance: 0.0018 S
Amplification factor: 3.5
Max plate voltage: 1000 V
Max plate dissipation: 125 W
Max grid dissipation: 50 W
Max cathode current: 210 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
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Plate resistance (nominal)
1900 ohms
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Grid to plate
8 pF
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Grid to filament
7 pF
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Other

DC plate voltage
1000 V
SourcePage1-2
Maximum-signal DC plate current
210 mA
SourcePage1-2
Plate Dissipation
125 W
SourcePage1-2
Grid Current
50 mA
SourcePage1-2
Grid voltage -78 -180
-180 V
TypicalOperation
DC plate current, zero signal 80 100
100 mA
TypicalOperation
DC plate current, max signal 85 120
140 mA
TypicalOperation
Plate load resistance 5000 5000
5000 ohms
TypicalOperation
Power output at distortion above 3.6 20
-
TypicalOperation
DC plate voltage 450 900
900 V
TypicalOperation
Grid voltage -87 -178
-178 V
TypicalOperation
DC Plate current, zero signal 150 220
220 mA
TypicalOperation
DC Plate current, max signal 175 260
380 mA
TypicalOperation
Plate load resistance 9600 9600
9600 ohms
TypicalOperation
Power output at distortion above 12 39
-
TypicalOperation
Vg =
80 v
TypicalOperation
Vg =
0 v
TypicalOperation