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Voltage Pentode - Sharp Cutoff (single) ·Pentode

7083

Sharp-cutoff pentode designed for RF, IF, wide-band, or high-frequency voltage-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5A
Base pins
5
Nominal heater
6.3 V / 200 mA

Description

Fast-warm-up sharp-cutoff subminiature pentode designed for VHF service with long life, stable performance, and high reliability under temperature and vibration.

Socket description

Subminiature 5-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B5A
Base pins
5
Nominal heater voltage
6.3 V
Nominal heater current
200 mA
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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
340000 Ω
Transconductance
0.005 S
Max plate dissipation
1.85 W

Published electrical section from 7083.pdf; identical repeated sections compressed when applicable.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage Eb: cenn 120 120

    200 V

    Plate Voltage Eb: cenn 120 120 200 Vdc

  • Plate Current (2): Ecl/Ib=50 pAdc 1.0 Ecl: -5.0 vees

    -9 V

    Plate Current (2): Ecl/Ib=50 pAdc 1.0 Ecl: -5.0 vees -9.0 Vdc

  • be vibrated in each of the three planes for 30 minutes at a fixed frequency between 50 and

    60 Hz

    then be vibrated in each of the three planes for 30 minutes at a fixed frequency between 50 and 60 cps for Vibration (1) and 450

  • ond

    500 Hz

    ond 500 cps for Vibration (2). The same tubes shall be used for both vibration tests.

Capacitance

  • Capacitance: (Note 2) 4.0 Cin: 4.5 seee

    5.6 pF

    Capacitance: (Note 2) 4.0 Cin: 4.5 seee 5.6 pf