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Power - Beam (NOT sweep) ·BeamPower

8149

Compactron beam-power pentode designed for Class-C RF amplification and oscillator service, providing about 40 watts output at 175 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
E12-74
Socket code
B12C
Base pins
12
Nominal heater
12.6 V / 1.5 A

Description

The 8149 is a single-ended Compactron beam-power pentode intended for RF power amplification and oscillator service up to about 175 MHz, with a center-tapped series/parallel heater.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
E12-74
Socket code
B12C
Base pins
12
Nominal heater voltage
12.6 V
Nominal heater current
1.5 A
Parallel heater voltage
6.3 V
Parallel heater current
3 A
Series capable
Yes

E12-74 - 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
0.0075 S
Amplification factor
4.5
Max plate voltage
750 V
Max screen voltage
250 V
Max plate dissipation
35 W
Max screen dissipation
3.3 W
Max cathode current
220 mA
Rectifier max heater-cathode voltage
200 V

Published promoted fields populated by semantic section ownership; identical repeated sections compressed.

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

  • Maximum Frequency

    175 MHz

    RFPowerAmplifier

  • Plate Voltage

    380 V

    Typical

Characteristic

  • Transconductance

    7500 uS

    Typical

  • TriodeConnectionAmplificationFactor

    4.5

    TriodeConnection

Data set 02

1965 Tung Sol Industrial Tubes

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater voltage

    13 V

  • Heater current

    600 mA

  • Maximum heater-cathode voltage

    135 V

  • Maximum frequency

    175 MHz

    ICAS

  • Typical plate voltage

    380 V

    ClassC 175MHz

  • Typical power output

    40 W

    ClassC 175MHz

Capacitance

  • Grid1-plate capacitance

    0.35 pF

  • Input capacitance

    13 pF

  • Output capacitance

    6 pF

Data set 03

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 capacitance

    0.35 pF

    WholeTube

  • Input capacitance

    13 pF

    WholeTube

  • Output capacitance

    6 pF

    WholeTube

  • Grid 1 To Plate: Gl Top

    0.35 pf

    PublishedTable

  • Average Values - Voltage

    6.5 VOLTS

    PublishedTable

  • Current

    1.2 AMPS

    PublishedTable

  • Limits Of Applied Heater Voltage

    7.5 VOLTS

    PublishedTable

  • Plate Voltage

    200 VOLTS

    PublishedTable

  • Grid 2 Voltage

    200 VOLTS

    PublishedTable

  • Plate Current

    100 MA

    PublishedTable

  • Plate Voltage -Dc

    750 VOLTS

    PublishedTable

  • Grid 2 Voltage

    250 VOLTS

    PublishedTable

  • Grid 1 Voltage - Dc

    150 VOLTS

    PublishedTable

  • Cathode Current-Dc

    220 MA

    PublishedTable

Other

  • Plate voltage

    360 V

    ClassC 175MHz

  • Grid 2 supply voltage

    380 V

    ClassC 175MHz

  • Grid 1 voltage

    -78 V

    ClassC 175MHz

  • Plate current

    180 mA

    ClassC 175MHz

  • Grid 2 current

    12 mA

    ClassC 175MHz

  • Grid 1 current

    2 mA

    ClassC 175MHz

  • Driving power

    2 W

    ClassC 175MHz

  • Power output

    40 W

    ClassC 175MHz