QY53000A

High-power forced-air-cooled VHF tetrode designed primarily for television transmitters. Its construction supports very substantial broadcast RF output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 32.5 A

Description

The Mullard QY53000A is a high-power forced-air-cooled VHF tetrode primarily for television transmitters.

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: 6.3 V
Nominal heater current: 32.5 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: 0.019 S
Max plate voltage: 6000 V
Max screen voltage: 1000 V
Max plate dissipation: 3000 W

High-power forced-air-cooled VHF tetrode primarily for television transmitters.

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

Tetrode

Characteristics

Input Capacitance
23.5 pF
Output Capacitance
8.4 pF
Plate-Grid Capacitance Maximum
0.35 pF
Transconductance
19000 uS
Va=4kV; Ia=2A

Other

Maximum Plate Dissipation
3000 W
Television RF Output Power
7000 W
Representative
Maximum Operating Frequency
220 MHz