TA1215

Water-cooled tungsten-filament power triode for high-frequency amplification in powerful transmitters. Approximately 7.5 kW plate dissipation and 12 kV capability support substantial Class B and Class C RF service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 22 V / 41 A

Description

Directly heated water-cooled tungsten-filament triode designed for high-frequency power amplification in powerful transmitters. The sheet gives class-B and class-C operating data, 12 kV anode rating, 7.5 kW dissipation, transconductance, and internal resistance.

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: 22 V
Nominal heater current: 41 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: 7300 Ω
Transconductance: 0.0055 S
Amplification factor: 40
Max plate voltage: 12000 V
Max plate dissipation: 7500 W
Max cathode current: 1.25 A

Water-cooled RF transmitting 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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

volts and the maximum anode dissipation of 7
-5 kW
50 % [1]
15 kW
50 % [2]
75 kW
50 % [3]
7.5 kW
60 % [1]
15 kW
60 % [2]
9 kW
60 % [3]
6 kW
65 % [1]
15 kW
65 % [2]
-8 kW
65 % [3]
52 kW
70 9% [1]
15 kW
70 9% [2]
10.5 kW
70 9% [3]
-5 kW
Anode voltage V, == max
12000 V
ClassB;Modulator
voltage current modulation power power [1]
12000 V
ClassB;Modulator
voltage current modulation power power [2]
28 kW
ClassB;Modulator
voltage current modulation power power [3]
112 kW
ClassB;Modulator
voltage current modulation power power [4]
75 kW
ClassB;Modulator
voltage current modulation power power [2]
33 kW
ClassB;Modulator
voltage current modulation power power [4]
10 kW
ClassB;Modulator
Mutual conductance at I, = 0°
8 A
ClassB;Modulator
voltage should not exceed 10,000 volts. Internal resistance atl, [1]
8 A
ClassC;ClassB;Modulator
voltage should not exceed 10,000 volts. Internal resistance atl, [2]
7300 ohms
ClassC;ClassB;Modulator

Characteristic

Filament voltage Vi
220 V
ClassB
Filament current I == appr
41 A
ClassB
Anode Anode Depth of Carrier Peak Total emission Iy, == appr
6 A
ClassB