Skip to main content

Power - Beam (NOT sweep) ·BeamPower

8042

Beam-power transmitting tube intended for RF amplifier service, providing substantial radio-frequency output for communications or industrial transmitting equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4B
Base pins
8
Nominal heater
1.6 V / 3.2 A

Description

Instant-heating 'Harp Cathode' beam-power tetrode for power output, oscillator or frequency-multiplier service in mobile or base equipment.

Socket description

Medium 4-pin bayonet

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B4B
Base pins
8
Nominal heater voltage
1.6 V
Nominal heater current
3.2 A
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
Transconductance
0.006 S
Amplification factor
4
Max plate voltage
750 V
Max screen voltage
250 V
Max plate dissipation
25 W
Max screen dissipation
3 W
Max cathode current
150 mA

RF beam-power tube (alias of 4652)

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 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate voltage

    650 V

    RFPower

  • Plate current

    160 mA

    RFPower

  • Power output

    65 W

    RFPower

  • Grid voltage

    -71 V

    RFPower

  • Grid current

    2.8 mA

    RFPower

  • Screen voltage

    180 V

    RFPower

Capacitance

  • Grid-to-plate capacitance

    0.24 pF

  • Input capacitance

    13 pF

  • Output capacitance

    8.5 pF

Data set 02

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Heater/filament voltage nominal

    1.6 V

    WholeTube

  • Heater/filament current nominal

    3.2 A

    WholeTube

  • sleeve and grid No

    2 pF

    Published source row

  • sleeve and grid No (value 2)

    11 pF

    Published source row

  • Plate to filament &grid No

    3

    Published source row

  • sleeve and grid No

    2 pF

    Published source row

  • sleeve and grid No (value 2)

    8.5 pF

    Published source row

  • DC Plate Voltage

    750 V

    Published source row

  • DC Grid-No

    2 V

    Published source row

  • DC Grid-No (value 2)

    250 V

    Published source row

  • DC Grid-No.l Voltage

    -150 V

    Published source row

  • DC Plate Current

    150 mA

    Published source row

  • DC Grid-No.l Current

    4 mA

    Published source row

  • Plate Input

    90 W

    Published source row

  • Grid-No

    2 W

    Published source row

  • Grid-No (value 2)

    3 W

    Published source row

  • Plate Dissipation

    25 W

    Published source row

  • Transconductance

    0.006 A/V

    Promoted field corroboration

  • Amplification factor

    4

    Promoted field corroboration

  • Verified Transconductance

    0.006 A/V

    Verified from supplied datasheet rating/characteristic table

  • Verified Amplification factor

    4

    Verified from supplied datasheet rating/characteristic table

Other

  • Voltage (AC or DC)

    1.6 %

    Published source row

  • Voltage (AC or DC) (value 2)

    10 %

    Published source row

  • Current at

    1.6 V

    Published source row

  • Current at (value 2)

    3.2 V

    Published source row

  • Heating time

    1

    Published source row

  • Transconductance°

    6000

    Published source row

  • Mu-Factor°, Grid No

    2

    Published source row

  • Mu-Factor°, Grid No (value 2)

    4

    Published source row

  • DC Plate Voltage

    400 V

    Published source row

  • DC Grid-No

    2 V

    Published source row

  • DC Grid-No (value 2)

    190 V

    Published source row

  • DC Grid~No.l Voltaged

    -60 V

    Published source row

  • DC Plate Current

    150 mA

    Published source row

  • DC Grid-No

    2 mA

    Published source row

  • DC Grid-No (value 2)

    11 mA

    Published source row

  • DC Grid-No.l Current (ApproxJ

    2 mA

    Published source row

  • Power Output (Approx.)

    30 W

    Published source row

  • Grid-No.l Circuit Resistance

    30000

    Published source row

  • For plate volts =

    200 V

    Published source row

  • For plate volts = (value 2)

    2 V

    Published source row

  • For plate volts = (value 3)

    200 V

    Published source row

  • current =

    100 mA

    Published source row

  • c See Electrical Cons iderations -Grid-No

    2

    Published source row

  • Maximum plate voltage

    750 V

    Promoted field corroboration

  • Maximum screen voltage

    250 V

    Promoted field corroboration

  • Maximum plate dissipation

    25 W

    Promoted field corroboration

  • Verified Maximum plate voltage

    750 V

    Verified from supplied datasheet rating/characteristic table

  • Verified Maximum screen voltage

    250 V

    Verified from supplied datasheet rating/characteristic table

  • Verified Maximum plate dissipation

    25 W

    Verified from supplied datasheet rating/characteristic table