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Power - Tetrode (NOT beam) ·Tetrode

QQV0750

UHF power double tetrode designed for Class-C amplification and frequency-multiplier service to approximately 500 MHz. Two sections provide compact paired RF power operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 1.8 A

Description

The Mullard QQV0750 is a uHF power double tetrode for Class C amplifier and frequency-multiplier service to 500 MHz.

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
1.8 A
Parallel heater voltage
6.3 V
Parallel heater current
1.8 A
Series capable
Yes

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
Max plate dissipation
25 W

Representative of two identical RF-power sections.

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 Voltage

    6.3 V

  • Heater Current

    1.8 A

  • Heater Voltage Series

    12.6 V

  • Heater Current Series

    900 mA

  • Heater Voltage Parallel

    6.3 V

  • Heater Current Parallel

    1.8 A

  • Push-Pull Output Capacitance

    2.1 pF

    TwoSections; PushPull

  • Push-Pull Input Capacitance

    6.7 pF

    TwoSections; PushPull

  • Plate-to-Other-Anode Capacitance

    3.2 pF

    EachSection

Other

  • Maximum Operating Frequency

    500 MHz

  • Maximum Plate Voltage

    750 V

    ClassC; TelegraphyOrFMTelephony; f<250MHz

  • Maximum Plate Voltage

    600 V

    ClassC; TelegraphyOrFMTelephony; f=500MHz

  • Maximum Plate Dissipation

    25 W

    EachSection; ClassC

  • RF Output Power

    103 W

    ClassC; TelegraphyOrFMTelephony

  • RF Output Power

    80 W

    ClassC; Telephony

  • RF Output Power

    27 W

    FrequencyMultiplier

  • Frequency Multiplier Output Frequency

    475 MHz

    Tripler; Input=153MHz