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Power - Beam (NOT sweep) ·BeamPower

829B

Twin-beam transmitting tube designed for VHF RF power-amplifier and oscillator service in push-pull circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7E-VA
Socket code
SEPTAR7
Base pins
7
Nominal heater
12.6 V / 1.125 A

Description

Twin-beam transmitting tube for VHF RF power-amplifier and oscillator service.

Socket description

Septar 7-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7E-VA
Socket code
SEPTAR7
Base pins
7
Nominal heater voltage
12.6 V
Nominal heater current
1.125 A
Parallel heater voltage
6.3 V
Parallel heater current
2.25 A
Series capable
Yes

7E-VA - 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
0.0085 S
Amplification factor
9
Max plate voltage
750 V
Max screen voltage
250 V
Max plate dissipation
20 W
Max screen dissipation
8 W
Max cathode current
240 mA

Representative row for two electrically identical beam-tetrode sections; ratings vary by service/cooling condition.

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

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    2.25 A

Other

  • FrequencyForMaximumRatings

    200 MHz

Data set 02

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristic

  • Transconductance

    8500 µS

Other

  • Maximum Plate Voltage

    750 V

  • Maximum Screen Voltage

    225 V

  • Maximum Plate Dissipation

    45 W

  • Maximum Cathode Current

    240 mA

  • Full-Input Operating Frequency Maximum

    200 MHz

  • Power Output

    90 W

    ClassC,RF

  • Heater Voltage Series

    12.6 V

  • Heater Current Series

    1.125 A

  • Heater Voltage Parallel

    6.3 V

  • Heater Current Parallel

    2.25 A

  • Typical Plate Voltage

    600 V

    Representative published point

  • Typical Plate Current

    200 mA

    Representative published point

Data set 03

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

  • Grid1AnodeCapacitancePerElement

    0.12 pF

  • InputCapacitancePerElement

    14.5 pF

  • OutputCapacitancePerElement

    7 pF

  • ScreenCathodeCapacitance

    65 pF

Other

  • MaximumHeaterCathodePeakVoltage

    100 V

  • Typical Plate Voltage

    600 V

  • Typical Screen Voltage

    200 V

  • TypicalOutputPower

    58 W

Data set 04

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate voltage

    750 V

    RFPowerAmplifier;EachSection

  • Plate current

    120 mA

    RFPowerAmplifier;EachSection

  • Power output

    65 W

    RFPowerAmplifier

  • Control-grid voltage

    -50 V

    RFPowerAmplifier

  • Grid current

    8 mA

    RFPowerAmplifier

  • Screen voltage

    200 V

    RFPowerAmplifier