TY1225A

Forced-air-cooled high-power RF transmitting triode. Approximately 15 kW plate dissipation and 13 kV capability support high-power radio-frequency generation and amplification in professional equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 8 V / 98 A

Description

Forced-air-cooled high-power RF transmitting triode.

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: 8 V
Nominal heater current: 98 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: 0.02 S
Amplification factor: 34
Max plate voltage: 13000 V
Max plate dissipation: 15000 W
Max cathode current: 4.8 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
8 V
HeaterOrFilamentCurrent
98 A
Grid To Plate Capacitance
28 pF
Input Capacitance
33 pF
Output Capacitance
0.3 pF
Transconductance
20 mA/V
PlateVoltage=12kV;PlateCurrent=2A
TransconductanceHighCurrent
30 mA/V
PlateVoltage=2kV;PlateCurrent=13A
Amplification Factor
34
Cooling
Forced air

Other

MaximumOperatingFrequency
30 MHz
MaxPlateVoltage
13 kV
MaxCathodeCurrent
4.8 A
MaxGridVoltageMagnitude
1.5 kV
MaxGridCurrent
800 mA
MaxPlateDissipation
15 kW
Frequency
30 MHz
ClassC
Plate Voltage
12 kV
ClassC
Plate Current
4.5 A
ClassC
Grid Current
800 mA
ClassC
Plate Dissipation
15 kW
ClassC
Power Output
37.5 kW
ClassC
Efficiency
69.5 %
ClassC