TY1220A

Forced-air-cooled high-power RF transmitting triode for substantial oscillator and amplifier service. Approximately 20 kW plate dissipation and 13 kV capability provide major professional radio-frequency power.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 8 V / 130 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: 130 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: 0.03 S
Amplification factor: 21
Max plate voltage: 13000 V
Max plate dissipation: 20000 W
Max grid dissipation: 1100 W
Max cathode current: 5 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
130 A
Grid To Plate Capacitance
23.5 pF
Input Capacitance
45 pF
Output Capacitance
0.9 pF
Transconductance
30 mA/V
Amplification Factor
21
Cooling
Forced air

Other

MaximumOperatingFrequency
30 MHz
MaxPlateVoltage
13 kV
MaxCathodeCurrent
5 A
MaxGridVoltageMagnitude
2 kV
MaxGridCurrent
1.5 A
MaxPlateDissipation
20 kW
MaxGridDissipation
1.1 kW
Frequency
30 MHz
ClassC
Plate Voltage
12 kV
ClassC
Plate Current
4.5 A
ClassC
Grid Current
900 mA
ClassC
Plate Dissipation
15 kW
ClassC
Efficiency
72.5 %
ClassC