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Voltage - Triode (single high frequency) ·Triode

5676

5676 directly heated 1.25 V 120 mA subminiature VHF oscillator triode for operation up to approximately 350 MHz, with four flexible leads.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5676
Socket code
B5D
Base pins
5
Nominal heater
1.25 V / 120 mA

Description

Directly heated subminiature triode for RF oscillator service.

Socket description

Subminiature wire-ended

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5676
Socket code
B5D
Base pins
5
Nominal heater voltage
1.25 V
Nominal heater current
120 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5676 - 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

Triode

X-ray radiationInterelectrode capacitances
Transconductance
0.0016 S
Amplification factor
15
Max plate voltage
135 V
Max cathode current
10 mA

Raytheon CK5676 and Tung-Sol 5676. Directly heated filament 1.25 V 0.12 A. Typical Class A at Va 135 V Vg -5 V Ia 4 mA: gm 0.0016 A/V, mu 15. Tung-Sol design-center max plate 135 V, plate current 10 mA; Raytheon absolute max 150 V, plate current 11 mA. Scalar max_plate_voltage 135 V retains design-center system. VHF oscillator 100–350 MHz: Va 135 V, grid leak 10 kΩ, grid current 150–500 µA, plate current 9 mA. Cgp 2.0 pF, Cgf 1.3 pF, Cpf 4.0 pF (Tung-Sol shielded); Raytheon Cgp 1.4, Cgf 1.3/1.2, Cpf 3.4/1.9 pF shielded/unshielded. Four leads: 1 plate, 2 filament -, 3 grid, 4 filament +. No rp published.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Input Capacitance

    1.3 pF

  • Output Capacitance

    4 pF

  • Grid-to-Plate Capacitance

    2 pF

Other

  • Plate Voltage

    135 V

    ClassA

  • Grid Voltage

    -5 V

    ClassA

  • Plate Current

    4 mA

    ClassA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    1.25 V

    Nominal

  • Heater current

    120 mA

    Nominal

  • Plate voltage

    135 V

    Published operating table; OperatingPoint1

  • Plate voltage

    135 V

    Published operating table; OperatingPoint1

  • Plate voltage

    135 V

    Published operating table; OperatingPoint1

Characteristic

  • Plate current

    10 mA

    Published operating table; OperatingPoint1

  • Plate current

    9 mA

    Published operating table; OperatingPoint1

  • Transconductance

    1 uS

    Published operating table; OperatingPoint1

  • Transconductance

    600 uS

    Published operating table; OperatingPoint2

Data set 03

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    135 V

    ClassA

  • Plate current

    9 mA

    ClassA

Characteristic

  • Transconductance

    1000 uS

    ClassA

  • Amplification factor

    15

    ClassA

Capacitance

  • Grid-to-plate capacitance

    2.6 pF

Data set 04

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Triode

Application

  • Application

    RFOscillator text