TY5500

Radiation-cooled RF power triode for transmitting service around 50 MHz. Approximately 1 kW plate dissipation and multi-kilovolt capability support kilowatt-class RF output in professional lower-VHF transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 5 V / 32.5 A

Description

Radiation-cooled power triode rated for 1.6 kW output around 50 MHz.

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: 5 V
Nominal heater current: 32.5 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: 0.033 S
Amplification factor: 21
Max plate voltage: 5000 V
Max plate dissipation: 1000 W
Max grid dissipation: 110 W
Max cathode current: 1.1 A

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
5 V
HeaterOrFilamentCurrent
32.5 A
Grid To Plate Capacitance
5.1 pF
Input Capacitance
9.2 pF
Output Capacitance
0.2 pF
Transconductance
33 mA/V
TransconductanceHighCurrent
10 mA/V
PlateVoltage=1kV;PlateCurrent=2.3A
Amplification Factor
21
MaximumOperatingFrequency
50 MHz

Other

MaximumOperatingFrequency
50 MHz
MaxPlateVoltage
5 kV
MaxGridVoltageMagnitude
1.25 kV
MaxPlateDissipation
1000 W
DutyFactor=0.2
MaxCathodeCurrent
1.1 A
DutyFactor=0.2
MaxGridDissipation
110 W
DutyFactor=0.2
MaxGridCurrent
420 mA
DutyFactor=0.2
Frequency
50 MHz
ClassC
Plate Voltage
4 kV
ClassC
Plate Current
490 mA
ClassC
Grid Current
140 mA
ClassC
Plate Dissipation
450 W
ClassC
Efficiency
77 %
ClassC
Power Output
1.5 kW
ClassC