TY4400

Directly heated all-glass VHF power triode designed primarily for RF amplifier service. Approximately 350 W plate dissipation and multi-kilovolt capability provide moderate-power high-frequency transmitter operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 10 V / 10 A

Description

All-glass VHF power triode for RF amplifier 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: 10 V
Nominal heater current: 10 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

Transconductance: 0.005 S
Amplification factor: 25
Max plate voltage: 4000 V
Max plate dissipation: 350 W
Max grid dissipation: 40 W
Max cathode current: 490 mA

Promoted from published Mullard absolute-maximum/limiting-value and characteristic tables; service-specific limits retained in parameter rows.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

HeaterOrFilamentVoltage
10 V
HeaterOrFilamentCurrent
10 A
Grid To Plate Capacitance
5.3 pF
Input Capacitance
150 pF
Output Capacitance
7 pF
Transconductance
5 mA/V
Amplification Factor
25
MaximumOperatingFrequency
100 MHz

Other

MaximumOperatingFrequency
100 MHz
MaxPlateVoltage
4 kV
DCAnodeSupply
MaxPlateDissipation
350 W
MaxGridDissipation
40 W
MaxCathodeCurrent
490 mA
DCAnodeSupply