YL1500

Forced-air-cooled coaxial metal-ceramic transmitting tetrode for high-power RF operation through roughly 110 MHz. Its directly heated cathode, 15 kW plate dissipation, and multi-kilovolt ratings suit major broadcast and communications transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 115 A

Description

Forced-air-cooled coaxial metal-ceramic transmitter tetrode for frequencies to 110 MHz and high-power RF service.

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: 7.5 V
Nominal heater current: 115 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: 0.035 S
Amplification factor: 4.8
Max plate voltage: 8000 V
Max screen voltage: 1000 V
Max plate dissipation: 15000 W
Max screen dissipation: 350 W
Max grid dissipation: 75 W
Max cathode current: 6.5 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

EmissionCurrent
28 A
UA = UG2 = UG1 = 400 V

Other

FrequencyMax
110 MHz
CarrierPower
22 kW
Class C; <=30 MHz
Typical Plate Voltage
7.5 kV
Class C
Typical Screen Voltage
800 V
Class C
Typical Plate Current
3.7 A
Class C
Efficiency
79.5 percent
Class C