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

50C5

Miniature beam-power tube designed for the audio-output stage of compact AC/DC radio receivers, optimized for useful power from low supply voltage.

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

Description

Beam power tube for the audio output stage of compact AC/DC radio receivers. It is an explicit heater variant/co-designation in 25C5.pdf.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7CV
Socket code
B7G
Base pins
7
Nominal heater voltage
50 V
Nominal heater current
150 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7CV - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1G3AG3 — Suppressor GridGroup 7CV1

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN1KAK — CathodeGroup 7CV1

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN2G1AG1 — Control Grid

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN3H—H — Heater

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN4H—H — Heater

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN5G1AG1 — Control Grid

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN6G2AG2 — Screen Grid

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

PIN7PAP — Plate (Anode)

EIA chart transcription; independent manufacturer verification pending

Unverified

EIA Base Connections, printed page 128, 7CV

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
10000 Ω
Transconductance
0.0075 S
Max plate voltage
135 V
Max screen voltage
117 V
Max plate dissipation
5.5 W
Max screen dissipation
1.25 W

Shared family ratings and Class A characteristics promoted; heater-specific differences remain at tube level.

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

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

  • Anode Voltage

    110 V

  • Anode Current

    49 mA

  • Screen Voltage

    110 V

  • Screen Current

    4 mA

  • Control Grid Voltage

    -7.5 V

  • Optimum Load

    2500 ohm

Other

  • Power Output

    1.9 W

    ClassA

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Maximum plate voltage

    135 V

    Published handbook rating

  • Maximum screen voltage

    117 V

    Published handbook rating

  • Plate voltage

    110 V

    ClassA

  • Screen voltage

    110 V

    ClassA

  • Control-grid bias

    7.5 V

    ClassA

  • Plate current

    49 mA

    ClassA

  • Screen current

    4 mA

    ClassA

  • Load resistance

    2500 ohm

    ClassA

  • Power output

    1.9 W

    ClassA

Characteristic

  • Plate resistance

    10000 ohm

    Published handbook characteristic

  • Transconductance

    7500 µS

    Published handbook characteristic

  • Heater/filament voltage

    50 V

    Published heater/filament rating

  • Heater/filament current

    150 mA

    Published heater/filament rating

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Maximum Signal Plate Current

    50 mA

Other

  • Maximum Signal Power Output

    2.3 W

Data set 04

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate voltage

    120 V

    ClassA

  • Plate current

    49 mA

    ClassA

Characteristics

  • Plate resistance

    10000 Ohm

  • Transconductance

    7500 uS

Data set 05

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Typical plate voltage

    120 V

    ClassA

  • Typical screen voltage

    110 V

    ClassA

  • Maximum signal power output

    2.3 W

    ClassA

Characteristics

  • Plate resistance

    10000 ohm

Application

  • Application

    Audio output amplifier

Data set 06

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Typical plate voltage

    120 V

    ClassA

  • Typical screen voltage

    110 V

    ClassA

  • Zero-signal plate current

    49 mA

    ClassA

  • Load resistance

    2500 ohm

    ClassA

  • Maximum-signal power output

    2.3 W

    ClassA

  • Maximum plate voltage

    150 V

    PromotedValue

  • Maximum screen voltage

    130 V

    PromotedValue

  • Maximum plate dissipation

    5.5 W

    PromotedValue

  • Maximum screen dissipation

    1.5 W

    PromotedValue

  • N+Aximum Plate Voltage

    150 V

    PublishedTable

  • Maximum Grid #2 Voltage

    130 V

    PublishedTable

  • Maximum Grid #2 Dissipation 1

    4 W

    PublishedTable

  • Zero- Signal Grid #2 Current

    4 mA

    PublishedTable

  • Maximum S16Mal Power Output

    2.3 W

    PublishedTable

  • ~ ~ Eb

    110 V

    PublishedTable

  • Eoi =

    -7.5 V

    PublishedTable

Characteristics

  • Plate resistance

    10000 ohm

    PromotedValue

  • Transconductance

    0.0075 A/V

    PromotedValue

Data set 07

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate Voltage

    110 V

    ClassA

  • Screen Voltage

    110 V

    ClassA

  • Plate Current

    49 mA

    ClassA

  • Screen Current

    4 mA

    ClassA

  • Load Resistance

    2500 ohm

    ClassA

  • Power Output

    1.9 W

    ClassA

  • Total Harmonic Distortion

    9 %

    ClassA

Data set 08

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Maximum Plate Voltage

    150 V

  • Maximum Screen Voltage

    130 V

  • Plate Dissipation

    7 W

  • Screen Input

    1.4 W

  • Plate Voltage

    120 V

  • Screen Voltage

    110 V

Characteristics

  • Plate Resistance

    10000 Ω

  • Transconductance

    7500 µS

Data set 09

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Peak value

    200 V

    MaximumRating;PublishedValue1

  • Peak value

    200 V

    MaximumRating;PublishedValue2

  • Average value

    100 V

    MaximumRating;PublishedValue1

  • Average value

    100 V

    MaximumRating;PublishedValue2

  • Plate Voltage

    150 V

    MaximumRating

  • Grid-No

    2 V

    MaximumRating;PublishedValue1

  • Grid-No

    130 V

    MaximumRating;PublishedValue2

  • Grid-No

    1 V

    MaximumRating;PublishedValue1

  • Grid-No

    0 V

    MaximumRating;PublishedValue2

  • Plate Dissipation

    7 W

    MaximumRating

  • Grid-No

    2 W

    MaximumRating;PublishedValue1

  • Grid-No

    1.4 W

    MaximumRating;PublishedValue2

  • Plate Voltage

    120 V

    TypicalOperation

  • Grid-No

    2 V

    TypicalOperation;PublishedValue1

  • Grid-No

    110 V

    TypicalOperation;PublishedValue2

  • Grid-No.l (Control-Grid) Voltage

    -8 V

    TypicalOperation

  • PLATE

    6603 V

    TypicalOperation

  • Peak AF Grid-No.l Voltage

    8 V

    TypicalOperation

  • Zero-Signal Plate Current

    49 mA

    TypicalOperation

  • Maximum-Signal Plate Current

    50 mA

    TypicalOperation

  • Zero-Signal Grid-No

    2 mA

    TypicalOperation;PublishedValue1

  • Zero-Signal Grid-No

    4 mA

    TypicalOperation;PublishedValue2

  • Maximum-Signal Grid-No

    2 mA

    TypicalOperation;PublishedValue1

  • Maximum-Signal Grid-No

    8.5 mA

    TypicalOperation;PublishedValue2

  • Plate Kesistance (Approx.)

    10000 ohm

    TypicalOperation

  • Load Resistance

    2500 ohm

    TypicalOperation

  • Total Harmonic Distortion

    10 %

    TypicalOperation

  • Maximum-Signal Power Output

    2.3 W

    TypicalOperation

  • For fixed-bias operation

    0.1 megohm

    MaximumCircuitValue

Capacitance

  • Grid No.] to Plate

    0.6 pF

    Capacitance

  • Grid No.l to Cathode, Heater. Grid No

    2 pF

    Capacitance;PublishedValue1

  • Grid No.l to Cathode, Heater. Grid No

    3 pF

    Capacitance;PublishedValue2

  • Grid No.l to Cathode, Heater. Grid No

    13 pF

    Capacitance;PublishedValue3

  • Plate to Cathode, Heater, Grid No

    2 pF

    Capacitance;PublishedValue1

  • Plate to Cathode, Heater, Grid No

    3 pF

    Capacitance;PublishedValue2

  • Plate to Cathode, Heater, Grid No

    8.5 pF

    Capacitance;PublishedValue3