Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - Beam (NOT sweep) ·BeamPower

2B33

Beam-power transmitting tetrode for driver and RF power-amplifier service to about 60 MHz; triode-connected data also support Class-AB audio power-amplifier and modulator operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 900 mA

Description

The 2B33 is an indirectly heated beam-power tetrode for transmitter driver and RF power-amplifier service up to about 60 MHz. In triode connection it is also suitable for audio-frequency power-amplifier and modulator service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
900 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
Transconductance
0.006 S
Max plate voltage
600 V
Max screen voltage
300 V
Max plate dissipation
25 W
Max screen dissipation
3.5 W

Published maximum ratings and characteristics audited; remaining numeric data retained densely in parameter table.

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

1971 NEC

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Published value [1]

    2 W

    2B33 is » beam power tetrode having an indirectly heated

  • Published value [2]

    3 W

    2B33 is » beam power tetrode having an indirectly heated

  • unipotential cathode. t

    4

    unipotential cathode. t 4

  • Published value [1]

    2 W

    2B33 is used as a driver or a power amplifier of a brans- £ H

  • Published value [2]

    3 W

    2B33 is used as a driver or a power amplifier of a brans- £ H

  • mitter up to a frequency of

    60

    mitter up to a frequency of 60 Milz.

  • Heater Voltage ....evevvevn [1]

    5.7 V

    Heater Voltage ....evevvevn. 5.7 6.3 6.9 v

  • Heater Voltage ....evevvevn [2]

    6.3 V

    Heater Voltage ....evevvevn. 5.7 6.3 6.9 v

  • Heater Voltage ....evevvevn [3]

    6.9 V

    Heater Voltage ....evevvevn. 5.7 6.3 6.9 v

  • Heater Current (ot [1]

    6.3 A

    Heater Current (ot 6.3 volts) - 0.9 - A

  • Heater Current (ot [2]

    900 mA

    Heater Current (ot 6.3 volts) - 0.9 - A

  • Transconductance ..eeeoves.os

    6000

    Transconductance ..eeeoves.os - 6000 - ]

  • Grid No [1]

    1

    Grid No. 1 to Flate (Note 1) - - 0.2 PP W * //

  • Grid No [2]

    1

    Grid No. 1 to Flate (Note 1) - - 0.2 PP W * //

  • Grid No [3]

    0.2

    Grid No. 1 to Flate (Note 1) - - 0.2 PP W * //

  • Published value

    3

    3 Grid Lol

  • AF Power Amplifier and Modulator-Class AB1 (Note

    3 W

    AF Power Amplifier and Modulator-Class AB1 (Note 3)

  • (Triode~connection, grid No

    2

    (Triode~connection, grid No. 2 is connected to plate)

  • DC Plate Voltage .........ccciuvrnnnnn e et N

    400 V

    DC Plate Voltage .........ccciuvrnnnnn e et N 400 Vdc

  • Max-Signal DC Plate Current (Note [1]

    4 A

    Max-Signal DC Plate Current (Note 4) .....ve.oc.. e tececteee s 125 mAde

  • Max-Signal DC Plate Current (Note [2]

    125 A

    Max-Signal DC Plate Current (Note 4) .....ve.oc.. e tececteee s 125 mAde

  • Max-Signal Plate Input (Note [1]

    4

    Max-Signal Plate Input (Note 4) L ....ieiieiiennnnnnn. ettt . 50 W

  • Max-Signal Plate Input (Note [2]

    50

    Max-Signal Plate Input (Note 4) L ....ieiieiiennnnnnn. ettt . 50 W

  • Plate Dissipation (Note [1]

    1 W

    Plate Dissipation (Note 1) .. ...t eennnns Creeee et rer e 25 W

  • Plate Dissipation (Note [2]

    25 W

    Plate Dissipation (Note 1) .. ...t eennnns Creeee et rer e 25 W

  • Peak Heater to Cathode Voltage ............ ceertrtasensan Cieeaetenaa +

    135 V

    Peak Heater to Cathode Voltage ............ ceertrtasensan Cieeaetenaa +135 V

  • DC Plate Voltage ...i.iivieieiinrreanneonnasoaanaanans cieeeeesesaa .o

    400 V

    DC Plate Voltage ...i.iivieieiinrreanneonnasoaanaanans cieeeeesesaa .o 400 Vdc

  • DC Grid No [1]

    1 V

    DC Grid No. 1 Voltage ..ot iiieeerinnnnsacnncnannnnes ceeeesa ceanena -45 Vdc

  • DC Grid No [2]

    -45 V

    DC Grid No. 1 Voltage ..ot iiieeerinnnnsacnncnannnnes ceeeesa ceanena -45 Vdc

  • Peak AF Grid No [1]

    1 V

    Peak AF Grid No. 1 to Grid No. 1 Voltage ............. Geeneeceeranan 90 V

  • Peak AF Grid No [2]

    1 V

    Peak AF Grid No. 1 to Grid No. 1 Voltage ............. Geeneeceeranan 90 V

  • Peak AF Grid No [3]

    90 V

    Peak AF Grid No. 1 to Grid No. 1 Voltage ............. Geeneeceeranan 90 V

  • Zero—Siénal DC Plate Current ...uiiieeevecaancaennaans ceesessasann v e

    64 A

    Zero—Siénal DC Plate Current ...uiiieeevecaancaennaans ceesessasann v e 64 mAdc

  • Max-Signal DC Plate Current ...e..ececeeeeeceeeensens ceiesseecnaan .o

    140 A

    Max-Signal DC Plate Current ...e..ececeeeeeceeeensens ceiesseecnaan .o 140 mAdc

  • ective Load Resistance (Plate to Plate) ........... e teeceeaeane [1]

    3000

    ective Load Resistance (Plate to Plate) ........... e teeceeaeane 3000 2

  • ective Load Resistance (Plate to Plate) ........... e teeceeaeane [2]

    2

    ective Load Resistance (Plate to Plate) ........... e teeceeaeane 3000 2

  • Maximum Grid No

    1

    Maximum Grid No. 1 Circutt Rezistance:

  • AF Power Amplifier and Modulator-Class AB1 (Yote

    3 W

    AF Power Amplifier and Modulator-Class AB1 (Yote 3)

  • DC Plate Voltage ...oieiiiiirinnnnnnnss cesenen Ceeereatncsenasnesans ceens

    600 V

    DC Plate Voltage ...oieiiiiirinnnnnnnss cesenen Ceeereatncsenasnesans ceens 600 Vdc

  • DC Grid No [1]

    2 V

    DC Grid No. 2 Voltage ...ttt iienenntocannonens cies e ceeree-enesoas 300 Vdc

  • DC Grid No [2]

    300 V

    DC Grid No. 2 Voltage ...ttt iienenntocannonens cies e ceeree-enesoas 300 Vdc

  • Max.-Signal Plate Input (Note [1]

    4

    Max.-Signal Plate Input (Note 4) ...veiieenvnenas N S 60 W

  • Max.-Signal Plate Input (Note [2]

    60

    Max.-Signal Plate Input (Note 4) ...veiieenvnenas N S 60 W

  • Max.-Signal Grid No [1]

    2

    Max.-Signal Grid No. 2 Input (Note 4) ........... et e, 3.5 W

  • Max.-Signal Grid No [2]

    4

    Max.-Signal Grid No. 2 Input (Note 4) ........... et e, 3.5 W

  • Max.-Signal Grid No [3]

    3.5

    Max.-Signal Grid No. 2 Input (Note 4) ........... et e, 3.5 W

  • Plate Dissipation (Note [1]

    4 W

    Plate Dissipation (Note 4) ............ e et e e Ceeeeeaen 25 W

  • Plate Dissipation (Note [2]

    25 W

    Plate Dissipation (Note 4) ............ e et e e Ceeeeeaen 25 W

  • DC Grid No [1]

    2 V

    DC Grid No. 2 Voltage (Note 6) ........ Ceeeeeaan eeean . 300 300 300 Vde

  • DC Grid No [2]

    6 V

    DC Grid No. 2 Voltage (Note 6) ........ Ceeeeeaan eeean . 300 300 300 Vde

  • DC Grid No [3]

    300 V

    DC Grid No. 2 Voltage (Note 6) ........ Ceeeeeaan eeean . 300 300 300 Vde

  • DC Grid No [4]

    300 V

    DC Grid No. 2 Voltage (Note 6) ........ Ceeeeeaan eeean . 300 300 300 Vde

  • DC Grid No [5]

    300 V

    DC Grid No. 2 Voltage (Note 6) ........ Ceeeeeaan eeean . 300 300 300 Vde

  • DC Grid No [1]

    1 V

    DC Grid No. 1 Voltage (Note T) tiiiiinnnrnennnennnanas =30 -32 -34 Vde

  • DC Grid No [2]

    30 V

    DC Grid No. 1 Voltage (Note T) tiiiiinnnrnennnennnanas =30 -32 -34 Vde

  • DC Grid No [3]

    -32 V

    DC Grid No. 1 Voltage (Note T) tiiiiinnnrnennnennnanas =30 -32 -34 Vde

  • DC Grid No [4]

    -34 V

    DC Grid No. 1 Voltage (Note T) tiiiiinnnrnennnennnanas =30 -32 -34 Vde

  • Pealkk AP Grid No [1]

    1 V

    Pealkk AP Grid No. 1 to Grid No, 1 Voltage ........ cesaan 60 64 68 V

  • Pealkk AP Grid No [2]

    1 V

    Pealkk AP Grid No. 1 to Grid No, 1 Voltage ........ cesaan 60 64 68 V

  • Pealkk AP Grid No [3]

    60 V

    Pealkk AP Grid No. 1 to Grid No, 1 Voltage ........ cesaan 60 64 68 V

  • Pealkk AP Grid No [4]

    64 V

    Pealkk AP Grid No. 1 to Grid No, 1 Voltage ........ cesaan 60 64 68 V

  • Pealkk AP Grid No [5]

    68 V

    Pealkk AP Grid No. 1 to Grid No, 1 Voltage ........ cesaan 60 64 68 V

  • Zero—Signal DC Plate Current ... iiirinenennanns e [1]

    50 A

    Zero—Signal DC Plate Current ... iiirinenennanns e 50 44 39 mAde

  • Zero—Signal DC Plate Current ... iiirinenennanns e [2]

    44 A

    Zero—Signal DC Plate Current ... iiirinenennanns e 50 44 39 mAde

  • Zero—Signal DC Plate Current ... iiirinenennanns e [3]

    39 A

    Zero—Signal DC Plate Current ... iiirinenennanns e 50 44 39 mAde

  • Max-Signal DC Plate Current ..... Chersessecatareases .o [1]

    143 A

    Max-Signal DC Plate Current ..... Chersessecatareases .o 143 141 139 mAdc

  • Max-Signal DC Plate Current ..... Chersessecatareases .o [2]

    141 A

    Max-Signal DC Plate Current ..... Chersessecatareases .o 143 141 139 mAdc

  • Max-Signal DC Plate Current ..... Chersessecatareases .o [3]

    139 A

    Max-Signal DC Plate Current ..... Chersessecatareases .o 143 141 139 mAdc

  • Zero-Signal DC Grid No [1]

    2 A

    Zero-Signal DC Grid No. 2 Current ........ e ‘e 2 1 0.6 mAdc

  • Zero-Signal DC Grid No [2]

    2 A

    Zero-Signal DC Grid No. 2 Current ........ e ‘e 2 1 0.6 mAdc

  • Zero-Signal DC Grid No [3]

    1 A

    Zero-Signal DC Grid No. 2 Current ........ e ‘e 2 1 0.6 mAdc

  • Zero-Signal DC Grid No [4]

    600 mA

    Zero-Signal DC Grid No. 2 Current ........ e ‘e 2 1 0.6 mAdc

  • Max-Signal DC Grid No [1]

    2 A

    Max-Signal DC Grid No. 2 Current .............. 16 15 15 mAde

  • Max-Signal DC Grid No [2]

    16 A

    Max-Signal DC Grid No. 2 Current .............. 16 15 15 mAde

  • Max-Signal DC Grid No [3]

    15 A

    Max-Signal DC Grid No. 2 Current .............. 16 15 15 mAde

  • Max-Signal DC Grid No [4]

    15 A

    Max-Signal DC Grid No. 2 Current .............. 16 15 15 mAde

  • Effective Load Resistance (Plate to Plate) [1]

    5800

    Effective Load Resistance (Plate to Plate) ............ 5800 8200 10000 Q

  • Effective Load Resistance (Plate to Plate) [2]

    8200

    Effective Load Resistance (Plate to Plate) ............ 5800 8200 10000 Q

  • Effective Load Resistance (Plate to Plate) [3]

    10000

    Effective Load Resistance (Plate to Plate) ............ 5800 8200 10000 Q

  • Max-Signal Driving Power (approx.) .....veiieecenn. cees [1]

    0 W

    Max-Signal Driving Power (approx.) .....veiieecenn. cees 0 ¢ 0w

  • Max-Signal Driving Power (approx.) .....veiieecenn. cees [2]

    0 W

    Max-Signal Driving Power (approx.) .....veiieecenn. cees 0 ¢ 0w

  • Max-Signal Plate Power Output (approx.) ......ieievane [1]

    36 W

    Max-Signal Plate Power Output (approx.) ......ieievane. 36 46 56 W

  • Max-Signal Plate Power Output (approx.) ......ieievane [2]

    46 W

    Max-Signal Plate Power Output (approx.) ......ieievane. 36 46 56 W

  • Max-Signal Plate Power Output (approx.) ......ieievane [3]

    56 W

    Max-Signal Plate Power Output (approx.) ......ieievane. 36 46 56 W

  • Grid No

    1

    Grid No. 1 Circuii Resistance '

  • AF Power Amplifier and Modulator-Class AB2 (Note

    5 W

    AF Power Amplifier and Modulator-Class AB2 (Note 5)

  • DC Plate Voltage ............ Ceeeectereacaannnan cetecteseesessennsanan

    600 V

    DC Plate Voltage ............ Ceeeectereacaannnan cetecteseesessennsanan 600G Vde

  • DC Grid No [1]

    2

    DC Grid No. 2 Vollage ...ccveerensoaeoaasooscsssasscannsosasavsesnsnnsas 300 Vdc

  • DC Grid No [2]

    300

    DC Grid No. 2 Vollage ...ccveerensoaeoaasooscsssasscannsosasavsesnsnnsas 300 Vdc

  • Max-Signal DC Plate Current (Note [1]

    4 A

    Max-Signal DC Plate Current (Note 4). tuiviuerierrioneiesocnnanancocnnns 120 mAdc

  • Max-Signal DC Plate Current (Note [2]

    120 A

    Max-Signal DC Plate Current (Note 4). tuiviuerierrioneiesocnnanancocnnns 120 mAdc

  • Max-Signal Grid No [1]

    2

    Max-Signal Grid No. 2 Input (Note 4) ..uiueuini niiieeiinenionnnnnns 3.5 W

  • Max-Signal Grid No [2]

    4

    Max-Signal Grid No. 2 Input (Note 4) ..uiueuini niiieeiinenionnnnnns 3.5 W

  • Max-Signal Grid No [3]

    3.5

    Max-Signal Grid No. 2 Input (Note 4) ..uiueuini niiieeiinenionnnnnns 3.5 W

  • Plate Dissipation (Note [1]

    4 W

    Plate Dissipation (Note 4) ..u.veeeecvrnenennnnnns Ceeeaeanacaas Ceesean 25 W

  • Plate Dissipation (Note [2]

    25 W

    Plate Dissipation (Note 4) ..u.veeeecvrnenennnnnns Ceeeaeanacaas Ceesean 25 W

  • Peak Heater to Cathode Voltage .......c.... teeerssscacsenanasaanas cee. I3

    5 V

    Peak Heater to Cathode Voltage .......c.... teeerssscacsenanasaanas cee. I35V

  • DC Plate Voltage ... .... ...t Ceetstasteesaes cecaseanse.a [1]

    400 V

    DC Plate Voltage ... .... ...t Ceetstasteesaes cecaseanse.a. 400 500 600 Vdc

  • DC Plate Voltage ... .... ...t Ceetstasteesaes cecaseanse.a [2]

    500 V

    DC Plate Voltage ... .... ...t Ceetstasteesaes cecaseanse.a. 400 500 600 Vdc

  • DC Plate Voltage ... .... ...t Ceetstasteesaes cecaseanse.a [3]

    600 V

    DC Plate Voltage ... .... ...t Ceetstasteesaes cecaseanse.a. 400 500 600 Vdc