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Power - Triode ·Triode

YD1212

Water-cooled external-anode ceramic-metal triode designed for high-power Class C industrial RF oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 380 A

Description

The Mullard YD1212 is a water-cooled external-anode ceramic-metal triode for high-power Class C industrial oscillators.

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
12.6 V
Nominal heater current
380 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
210.526 Ω
Transconductance
0.19 S
Amplification factor
40
Max plate voltage
16800 V
Max plate dissipation
120000 W
Max cathode current
25 A

High-power industrial oscillator triode.

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

Other

  • Maximum Operating Frequency

    30 MHz

  • Maximum Plate Voltage

    16800 V

  • Maximum Plate Dissipation

    100000 W

  • Operating Frequency

    30 MHz

    ClassC; IndustrialOscillator

  • Plate Voltage

    14000 V

    ClassC

  • Plate Current

    23.5 A

    ClassC

  • RF Output Power Less Drive

    240 kW

    ClassC

  • Efficiency

    75.2 percent

    ClassC

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Filament voltage

    12.6 V

  • Filament current

    380 A

  • Transconductance

    190000 uS

  • Amplification factor

    40

Capacitance

  • Anode to filament capacitance

    3 pF

  • Grid to filament capacitance

    185 pF

  • Anode to grid capacitance

    60 pF

Other

  • Maximum anode voltage

    16800 V

  • Maximum anode current

    25 A

  • Maximum anode dissipation

    120000 W

  • Operating frequency

    30 MHz

    IndustrialClassC

  • Operating anode voltage

    14000 V

    IndustrialClassC;Frequency=30MHz

  • Operating anode current

    23.5 A

    IndustrialClassC;Frequency=30MHz

  • Anode output power

    247500 W

    IndustrialClassC;Frequency=30MHz

  • Frequency for full ratings

    100 MHz

Construction

  • Cooling system

    Water