QY5500

RF power tetrode designed for amplification, frequency multiplication, and modulation. Its transmitting construction supports versatile professional radio-frequency service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 10 V / 9.9 A

Description

The Mullard QY5500 is a rF power tetrode for amplification, frequency multiplication, and modulation.

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: 10 V
Nominal heater current: 9.9 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: 0.007 S
Max plate voltage: 5000 V
Max screen voltage: 700 V
Max plate dissipation: 500 W

RF power tetrode for amplification, frequency multiplication, and modulation.

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
24 pF
Output Capacitance
8.3 pF
Plate-Grid Capacitance
0.25 pF
Transconductance
7000 uS

Other

Maximum Plate Voltage
5000 V
f<75MHz
Maximum Plate Voltage
4500 V
f=110MHz
Maximum Plate Dissipation
500 W
RF Output Power
1760 W
Continuous; 75MHz