4030C

Double-ended water-cooled pure-tungsten power triode for high-power audio modulation and RF applications. Roughly 80 kW plate dissipation, low plate resistance, and 17.5 kV plate capability place it among extremely large transmitter power devices.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 25 V / 250 A

Description

Double-ended water-cooled triode with a pure tungsten filament, intended for high-power audio-frequency/modulator and radio-frequency 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: 250 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: 1800 Ω
Transconductance: 0.02 S
Amplification factor: 36
Max plate voltage: 17500 V
Max plate dissipation: 80000 W
Max grid dissipation: 1500 W
Max cathode current: 11 A

Published ratings/characteristics promoted; remaining useful source values represented as parameters.

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

1937 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Total emission
45 A
Grid-anode capacitance
61 pF
Anode-filament capacitance
15 pF
Grid-filament capacitance
45 pF

Other

Maximum direct anode current
11 A
Maximum frequency at full ratings
2 MHz
Maximum anode voltage at 22 MHz
15000 V
Frequency=22MHz
Direct anode voltage
14000 V
ClassB;AF;TwoTubes
Grid bias
-150 V
ClassB;AF;TwoTubes
Maximum output
100 kW
ClassB;AF;TwoTubes

Data set 02

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Heater/filament voltage
25 V
Heater/filament current
250 A
Plate resistance
1800 ohm
Transconductance
0.02 A/V
Amplification factor
36

Other

Maximum direct anode voltage
17500 V
Maximum anode dissipation
80000 W
Maximum grid dissipation
1500 W

Data set 03

1947 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

GridToAnodeCapacitance
61 pF
Grid To Filament Capacitance
45 pF
AnodeToFilamentCapacitance
15 pF
PeakEmission
45 A