QQV0310

Miniature RF power double tetrode designed for amplifier and oscillator service to approximately 225 MHz. Its twin construction supports compact VHF power circuits.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: -
Nominal heater: 6.3 V / 830 mA

Description

Miniature RF power double tetrode for amplifier/oscillator service to 225 MHz.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 830 mA
Parallel heater voltage: 6.3 V
Parallel heater current: 830 mA
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 voltage: 300 V
Max screen voltage: 200 V
Max plate dissipation: 5 W
Max screen dissipation: 1 W
Max cathode current: 50 mA

Two electrically similar RF tetrode sections; represented once under identical-section compression.

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

Other

Maximum operating frequency
225 MHz
RF operating frequency
100 MHz
ClassC
RF plate voltage
300 V
ClassC
RF screen voltage
175 V
ClassC
RF control-grid voltage
-40 V
ClassC
RF plate current per section
38 mA
ClassC
RF output power
16 W
ClassC
RF operating frequency
200 MHz
ClassC
RF plate voltage
300 V
ClassC
RF screen voltage
175 V
ClassC
RF control-grid voltage
-40 V
ClassC
RF plate current per section
38 mA
ClassC
RF output power
14 W
ClassC
RF operating frequency
175 MHz
ClassC,Modulated
RF plate voltage
200 V
ClassC,Modulated
RF screen voltage
175 V
ClassC,Modulated
RF control-grid voltage
-60 V
ClassC,Modulated
RF plate current per section
34 mA
ClassC,Modulated
RF output power
9 W
ClassC,Modulated
Heater-cathode voltage maximum
100 V

Capacitance

Plate-grid capacitance per section
0.1 pF
Push-pull input capacitance
5 pF
PushPull
Push-pull output capacitance
1.5 pF
PushPull
Grid-to-all capacitance per section
6.2 pF
Plate-to-all capacitance per section
2.6 pF

Characteristics

Grid1-to-grid2 amplification factor
7.5
Heater warm-up time
22 s

Application

Application
RF power amplifier / oscillator / frequency multiplier