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Voltage Pentode - High Frequency (single) ·Pentode

415A

Western Electric UHF suppressor-grid pentode with independent suppressor control for gating, modulation, mixing, and specialized high-frequency circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 150 mA

Description

Miniature suppressor-grid pentode for UHF service and independent suppressor-grid control.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
150 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
Transconductance
0.00185 S
Max plate voltage
180 V
Max screen voltage
140 V
Max plate dissipation
1.7 W
Max screen dissipation
0.75 W
Max cathode current
18 mA

Promoted fields mapped from printed maximum-rating and characteristic headings; additional published values preserved in parameter rows.

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

2026 Western Electric 400s

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage, A-C or B-C .. ... ceun... rrrtesreveenas teereans

    6.3 volts

    Heater Voltage, A-C or B-C .. ... ceun... rrrtesreveenas teereans 6.3 volts

  • Nominal Heater Current .....vveecenenns titicenenaaacs srssetsesnnnana

    150 milliamperes

    Nominal Heater Current .....vveecenenns titicenenaaacs srssetsesnnnana 150 milliamperes

  • Piate Voltage ...... fedstesaanseartieracans Geresesvrnesnoca ceeseee

    180 volts

    Piate Voltage ...... fedstesaanseartieracans Geresesvrnesnoca ceeseee 180 volts

  • ‘Screen

    6 volts

    ‘Screen-6rid Voltage ..... reversreanna sererserrasas teeeseresararranna 1IN0 volts

  • Cathode Current .c.ccevcacrvenvasanana

    18 milliamperes

    Cathode Current .c.ccevcacrvenvasanana 18 milliamperes

  • Heater-Cathode Voltage ....... sesan

    80 volts

    Heater-Cathode Voltage ....... sesan 80 volts

  • Bulb Temperature cuc... titseennenas

    120 centigrade

    Bulb Temperature cuc... titseennenas 120 centigrade

  • Plate VOltage .uvvencraesoncranccnsnsstcusnonnsnsannssssnsesn

    120 volts

    Plate VOltage .uvvencraesoncranccnsnsstcusnonnsnsannssssnsesn 120 120 volts

  • Control-Grid Voltage ....... Chesseravssans Gttt esatansrasanaa

    -2 volts

    Control-Grid Voltage ....... Chesseravssans Gttt esatansrasanaa -2 -2 volts

  • Plate Current ...cvvicvnecnaes resessannanaan Seersasnesetonans

    3.6 milliamperes

    Plate Current ...cvvicvnecnaes resessannanaan Seersasnesetonans 3.6 5.2 milliamperes

  • Plate Voltage ....... e Pt e et it i et s aas s n e ean ey ‘e

    120 volts

    Plate Voltage ....... e Pt e et it i et s aas s n e ean ey ‘e 120 volts

  • Screen-Grid Voltage cvvrevunncacnnnnses Crreaarenaeae ve et senaascaansrnn

    120 volts

    Screen-Grid Voltage cvvrevunncacnnnnses Crreaarenaeae ve et senaascaansrnn 120 volts

  • Plate Voltage .v.ocrvevecenaennnns PPN Chraenrsseaann randndsssansennrne

    120 volts

    Plate Voltage .v.ocrvevecenaennnns PPN Chraenrsseaann randndsssansennrne 120 volts

  • Screen-Grid Voltage +..vevuncrenneeonnns e diererass e

    -120 volts

    Screen-Grid Voltage +..vevuncrenneeonnns e diererass e . - 120 volts

  • current of

    10 volts

    current of 10 MiCrodmperes ...ceeveescssmoncecesonanassssnsas P . -10 volts

  • Published value

    4 VOLTS

    4 GRID VOLTAGE =120 VOLTS —+ ] 14 ] | tes I

  • T s IscREEN-GRID VOLTAGE

    120 VOLTS

    T s IscREEN-GRID VOLTAGE 120 VOLTS | 1 ; EB=ECE=I5V| y

  • Published value

    4 VOLTS

    4 Ef-63 VOLTS __ PLATE VOLTAGE®20 VOLTS 2 r-63 VOLTS g

  • SCREEN-GRID VOLTAGE =

    120 VOLTS

    SCREEN-GRID VOLTAGE =120 VOLTS 10 | PLATE vOL

  • VOLTAGE

    120 VOLTS

    VOLTAGE : 120 VOLTS/

  • Published value

    2 VOLTS

    2 -- — L e — PLATE VOLTAGE=(20 VOLTS

  • Ef

    263 VOLTS

    - Ef 263 VOLTS Z0 \ SCREEN-GRID VOLTAGE= 120 VOLTS

  • z.° PLATE VOLTAGE =

    120 VOLTS

    z.° PLATE VOLTAGE =120 VOLTS &0 N

  • Published value

    13 VOLTS

    13 |SOREEN-GRID VOLTAGE =120 VOLTS €~ - l | [

  • wb

    5000 VOLTS

    wb 5000 PLATE VOLTAGE=I20 VOLTS L

  • Published value

    1400 VOLTS

    1400 | YOUTAGE Eci==1/N\ PLATE VOLTAGE=I20 VOLTS

  • w \ SCREEN-GRIG VOLTAGE =

    120 VOLTS

    w \ SCREEN-GRIG VOLTAGE =120 VOLTS

Other

  • Plate Dissipation ceesvas tissenenaae teessesconnasaanss taetsasennnene

    1.7 watts

    Plate Dissipation ceesvas tissenenaae teessesconnasaanss taetsasennnene 1.7 watts

  • Screen-Grid Dissipation v.c.... teacrecenaanas teeaseatresnanes sreesen

    0.75 watt

    Screen-Grid Dissipation v.c.... teacrecenaanas teeaseatresnanes sreesen 0.75 watt