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Power - Beam (NOT sweep) ·BeamPower

7867

Beam-power transmitting tube intended for RF power amplification in communications equipment, with substantial high-frequency output and transmitting-style ratings.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 1.5 A

Description

The 7867 is a beam-power pentode designed for efficient, high-sensitivity audio output service and capable of substantial single-ended or push-pull output power.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
1.5 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
Plate resistance
12000 Ω
Transconductance
0.01 S
Max plate voltage
700 V
Max screen voltage
175 V
Max plate dissipation
24 W
Max screen dissipation
3.6 W
Max cathode current
220 mA

Beam-power section; detailed class/service ratings retained as parameters.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    1.5 A

    Nominal

  • Plate voltage

    700 V

    Typical operating conditions

  • Plate current

    80 mA

    Typical operating conditions

  • Screen current

    1 mA

    Typical operating conditions

Data set 02

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Grid #1 To Plate (Approx.)

    1.1 pf

    PublishedTable

  • Heater

    0.6 voLTs

    PublishedTable

  • Grid

    9 VOLTS

    PublishedTable

  • Peak

    1 VOLTS

    PublishedTable

  • Zero Signal Plate Current

    0 MA

    PublishedTable

  • Plate

    0 OHMS

    PublishedTable

  • Load

    0 OHMS

    PublishedTable

  • Plate

    5 VOLTS

    PublishedTable

  • Grid

    0 VOLTS

    PublishedTable

  • Cathode

    6 OHMS

    PublishedTable

  • Grid #1 Voltage

    -3 VOLTS

    PublishedTable

  • Peak

    69 VOLTS

    PublishedTable

  • Zero Signal Plate Current

    5 MA

    PublishedTable

  • Zero Signal Grid

    4 MA

    PublishedTable

Other

  • Maximum Plate Voltage

    7 VOLTS

    PublishedTable

  • Maximum Grid #2 Voltage

    175 VOLTS

    PublishedTable

  • Maximum Plate Dissipation

    24 WATTS

    PublishedTable

  • Maximum Grid

    3.6 WATTS

    PublishedTable

  • Maximum Cathode Current—Average

    220 MA

    PublishedTable

  • Maximum Grid #1 Circuit Resistance

    5 MEGOHM

    PublishedTable

  • Max. Signal Grid #2 Current

    6 MA

    PublishedTable

  • Max. Signal Plate

    6 MA

    PublishedTable