YL1057

Coaxial forced-air-cooled metal-ceramic power tetrode for television sound-transmitter finals and RF amplification. Manufacturer operating data extends through 860 MHz, with kilowatt-class output maintained across both VHF and UHF broadcast service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 3.8 V / 19.5 A

Description

Coaxial forced-air-cooled metal-ceramic transmitter tetrode for power amplifiers and TV sound transmitter final stages up to the UHF range.

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: 3.8 V
Nominal heater current: 19.5 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

Tetrode

X-ray radiationInterelectrode capacitances

Transconductance: 0.055 S
Amplification factor: 11
Max plate voltage: 4000 V
Max screen voltage: 650 V
Max plate dissipation: 2000 W
Max screen dissipation: 30 W
Max grid dissipation: 5 W
Max cathode current: 1.2 A

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 Siemens

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Typical Plate Voltage
3000 V
Transconductance test point
Typical Screen Voltage
500 V
Transconductance test point
Typical Plate Current
500 mA
Transconductance test point

Capacitance

CathodeControlGridCapacitance
38 to 46 pF
Nominal
CathodeScreenGridCapacitance
1.9 to 2.5 pF
Nominal
ControlGridScreenGridCapacitance
56 to 64 pF
Nominal

Other

OutputPower
2.2 kW
TV sound transmitter; 170-230 MHz
OutputPowerUHF
1.3 kW
TV sound transmitter; 470-860 MHz