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QY365

Directly heated VHF power tetrode designed for RF and audio/modulator service. Its transmitting construction supports both radio-frequency and modulation power.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6 V / 3.5 A

Description

The Mullard QY365 is a directly heated VHF power tetrode for RF and audio/modulator 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: 6 V
Nominal heater current: 3.5 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: 0.004 S
Max plate voltage: 3000 V
Max screen voltage: 400 V
Max plate dissipation: 65 W

Directly heated VHF power tetrode for RF and audio/modulator service.

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

Heater/Filament Voltage
6 V
Heater/Filament Current
3.5 A
Transconductance
4000 uS
RepresentativeSpecifiedOperatingPoint
Input Capacitance
8 pF
Output Capacitance
2.1 pF
Plate-Grid Capacitance
0.08 pF

Other

Maximum Operating Frequency
250 MHz
FullOrSpecifiedRatings
Maximum Plate Voltage
3000 V
Maximum Screen Voltage
400 V
Maximum Plate Dissipation
65 W
RF Output Power
280 W
RepresentativePublishedOperatingPoint
RF Output Power
110 W
RepresentativePublishedOperatingPoint
Push-Pull Audio Output Power
270 W
RepresentativePublishedOperatingPoint
Plate Voltage
3000 V
ClassC; 50MHz
Plate Current
115 mA
ClassC; 50MHz
RF Output Power
280 W
ClassC; 50MHz
Plate Voltage
1500 V
ClassC; 220MHz
RF Output Power
110 W
ClassC; 220MHz