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Power - Beam Single (NOT sweep) (under 10W) ·BeamPower

6945

Premium subminiature beam-power pentode designed specifically for guided-missile service, emphasizing stable performance under severe altitude and mechanical environmental conditions.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B8D
Base pins
8
Nominal heater
6.3 V / 350 mA

Description

THE 6945 IS A BEAM POWER PENTODE IN THE 8 PIN SUBMINIATURE CONSTRUCTION. IT IS DESIGN- ED SPECIFICALLY FOR GUI DED MISSILE SERVICE. THIS TYPE IS CHARACTERIZED BY STABLE PERFORMANCE IN OPE RATION AT HIGH ALTITUDES WHERE SEVERE CONDITIONS OF MECHANICAL

Socket description

Subminiature 8-lead

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B8D
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
350 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

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
20000 Ω
Transconductance
0.0035 S
Amplification factor
5
Max plate voltage
250 V
Max screen voltage
150 V
Max plate dissipation
3 W
Max screen dissipation
0.33 W
Max cathode current
40 mA

Published source ratings/characteristics promoted where applicable; identical repeated sections compressed.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Plate Resistance

    1500 ohm

  • Transconductance

    3700 µS

  • Amplification Factor

    5

Other

  • Maximum Plate Voltage

    250 V

  • Maximum Plate Dissipation

    3 W

  • Maximum Screen Dissipation

    0.33 W

  • Maximum Cathode Current

    40 mA

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    350 mA

    Nominal

  • Plate voltage

    100 V

    Published operating table; OperatingPoint1

  • Plate voltage

    100 V

    Published operating table; OperatingPoint2

  • Plate voltage

    150 V

    Published operating table; OperatingPoint1

  • Plate voltage

    250 V

    Published operating table; OperatingPoint2

  • Plate voltage

    150 V

    Published operating table; OperatingPoint3

  • Plate voltage

    150 V

    Published operating table; OperatingPoint1

  • Plate voltage

    200 V

    Published operating table; OperatingPoint2

  • Plate voltage

    185 V

    Published operating table; OperatingPoint3

  • Screen voltage

    150 V

    Published operating table; OperatingPoint1

  • Screen voltage

    100 V

    Published operating table; OperatingPoint1

  • Screen voltage

    100 V

    Published operating table; OperatingPoint2

  • Screen voltage

    110 V

    Published operating table; OperatingPoint1

  • Screen voltage

    125 V

    Published operating table; OperatingPoint2

  • Screen voltage

    10 V

    Published operating table; OperatingPoint3

Characteristic

  • Plate current

    23.8 mA

    Published operating table; OperatingPoint1

  • Plate current

    14.2 mA

    Published operating table; OperatingPoint2

  • Plate current

    21.5 mA

    Published operating table; OperatingPoint3

  • Plate current

    25.3 mA

    Published operating table; OperatingPoint1

  • Plate current

    15.5 mA

    Published operating table; OperatingPoint2

  • Plate current

    20.5 mA

    Published operating table; OperatingPoint3

  • Plate current

    37.5 mA

    Published operating table; OperatingPoint1

  • Plate current

    270 mA

    Published operating table; OperatingPoint2

  • Plate current

    2.7 mA

    Published operating table; OperatingPoint3

  • Plate resistance

    1500 ohm

    Published operating table; OperatingPoint1

  • Plate resistance

    20000 ohm

    Published operating table; OperatingPoint2

Data set 03

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    350 mA

    Nominal

  • Maximum plate voltage

    250 V

    Promoted published value

  • Maximum screen voltage

    150 V

    Promoted published value

  • Maximum plate dissipation

    3 W

    Promoted published value

  • Maximum screen dissipation

    0.33 W

    Promoted published value

  • Maximum cathode current

    40 mA

    Promoted published value

  • DC PLATE VOLTAGE

    250 V

    MAXIMUM RATINGS

  • PEAK-PLATE FORWARD VOLTAGE

    360 V

    MAXIMUM RATINGS

  • GRID 2 VOLTAGE

    150 V

    MAXIMUM RATINGS

  • PLATE DISSIPATION

    3 W

    MAXIMUM RATINGS

  • GRID 2 DISSIPATION

    0.33 W

    MAXIMUM RATINGS

  • CATHODE CURRENT

    40 mA

    MAXIMUM RATINGS

  • GRID i CIRCUIT RESISTANCE

    0.5 ohm

    MAXIMUM RATINGS

  • BULB TEMPERATURE

    250 C

    MAXIMUM RATINGS

  • PLATE VOLTAGE

    150 V

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • GRID 2 VOLTAGE

    110 V

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • PEAK AF GRID 1 VOLTAGE

    10.6 V

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • ZERO -SIGNAL PLATE CURRENT

    21.5 mA

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • MAX, -SIGNAL PLATE CURRENT

    20.5 mA

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • ZERO -SIGNAL GRID 2 CURRENT - - ~

    0.8 mA

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • MAX. -SIGNAL GRID 2 CURRENT

    3.23 mA

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • MAX, -SIGNAL POWER OUTPUT

    1.22 W

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • LOAD RESISTANCE

    7000 ohm

    CLASS A~ AMPLIFIER -SINGLE TUBE

  • PLATE VOLTAGE

    185 V

    CLASS A~ CLASS ABZ

  • GRID2 VOLTAGE

    110 V

    CLASS A~ CLASS ABZ

  • GRID 1 VOLTAGE — — —

    15 V

    CLASS A~ CLASS ABZ

  • PEAK AF GRID TO GRID VOLTAGE

    31.2 V

    CLASS A~ CLASS ABZ

  • ZERO—SIGNAL PLATE CURRENT

    26.7 mA

    CLASS A~ CLASS ABZ

  • MAX. —SIGNAL PLATE CURRENT

    46 mA

    CLASS A~ CLASS ABZ

  • ZERO —SIGNAL GRID 2 CURRENT

    0.67 mA

    CLASS A~ CLASS ABZ

  • MAX,—SIGNAL GRID 2 CURRENT

    5.9 mA

    CLASS A~ CLASS ABZ

  • MAX. SIGNAL POWER OUTPUT

    4.76 W

    CLASS A~ CLASS ABZ

  • LOAD RESISTANCE -PLATE TO PLATE

    10000 ohm

    CLASS A~ CLASS ABZ

  • ALTITUDE —ABSOLUTE MAXIMUM 80, 000 FT

    0 mA

    SPECIAL TESTS AND RATINGS

Characteristic

  • Plate resistance

    20000 ohm

    Promoted published value

  • Transconductance

    3500 uS

    Promoted published value

  • LIMITS OF APPLIED VOLTAGE 5.5 TO

    6.9 V

    AVERAGE CHARACTERISTICS 6.3 VOLTS 350 mA

  • DC PLATE VOLTAGE

    100 V

    AVERAGE CHARACTERISTICS

  • DC GRID 2 VOLTAGE

    100 V

    AVERAGE CHARACTERISTICS

  • DC PLATE CURRENT

    25 mA

    AVERAGE CHARACTERISTICS

  • DC GRID 2 CURRENT

    1.5 mA

    AVERAGE CHARACTERISTICS

  • AMPLIFICATION FACTOR 5.0

    5 A

    AVERAGE CHARACTERISTICS

  • PLATE RESISTANCE - APPROX. 1,_`

    20000 ohm

    AVERAGE CHARACTERISTICS

  • DC GRID 1 VOLTAGE FOR 16 = 35 pA

    -40 V

    AVERAGE CHARACTERISTICS