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

50B5

Series-heater power tetrode designed for low-frequency audio-output amplification in transformerless radio and consumer receiver equipment.

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

Description

Series-heater power tetrode for low-frequency audio output amplification.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7BZ
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

7BZ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Pin 1AG1 — Control GridVerified

Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

PIN2Pin 2AG3 — Suppressor GridGroup BZ2Verified

Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

PIN2Pin 2AK — CathodeGroup BZ2Verified

Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

PIN3Pin 3—H — HeaterVerified

Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

PIN4Pin 4—H — HeaterVerified

Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

PIN5Pin 5AP — Plate (Anode)Verified

Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

PIN6Pin 6AG2 — Screen GridVerified

Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

PIN7Pin 7AG1 — Control GridVerified

Tung-Sol 6AQ5/6AQ5A 7BZ basing; manufacturer pinout

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
14000 Ω
Transconductance
0.0075 S
Max plate voltage
150 V
Max screen voltage
117 V
Max plate dissipation
5 W
Max screen dissipation
1 W

beam power amplifier

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

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 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Power Output

    2 W

    ClassA

  • ElectricalDataReference

    35B5 except heater characteristics

Data set 03

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

    110 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

    135 V

    PromotedValue

  • Maximum screen voltage

    135 V

    PromotedValue

  • Maximum plate dissipation

    6 W

    PromotedValue

  • Maximum screen dissipation

    1.25 W

    PromotedValue

  • Maximum Gr10 #2 Voltage

    117 V

    PublishedTable

  • Total Dc And Peak

    200 V

    PublishedTable

  • Zero—Signal Plate Current

    49 mA

    PublishedTable

  • Zero—Signal Grid #2 Current

    4 mA

    PublishedTable

  • Ef =

    50 V

    PublishedTable

  • Eb =

    110 V

    PublishedTable

  • Ecz =

    110 V

    PublishedTable

  • Eci =

    -7.5 V

    PublishedTable

Characteristics

  • Plate resistance

    10000 ohm

    PromotedValue

  • Transconductance

    0.0075 A/V

    PromotedValue

  • 50 Volts

    150 mA

    PublishedTable

  • Grid To Plate: (G1 To P)

    0.6 ΜΜF

    PublishedTable

  • Output; P To (H+K+G2+G})

    8.5 ΜΜF

    PublishedTable

Data set 04

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Application

  • Application

    AudioOutput text

Data set 05

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Maximum Plate Voltage

    117 V

  • Maximum Screen Voltage

    117 V

  • Plate Dissipation

    5.5 W

  • Screen Dissipation

    1.25 W

  • Plate Voltage

    110 V

  • Screen Voltage

    110 V

Characteristics

  • Plate Resistance

    14000 Ω

  • Transconductance

    7500 µS