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Power - Beam (NOT sweep) ·BeamPower

7757

Ruggedized beam-power tube for demanding high-voltage pulse service, rated around 3 kV plate voltage and 2 A peak cathode current with severe shock and vibration capability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 600 mA

Description

The 7757 is a high-perveance beam-power amplifier in a nine-pin miniature hard-glass envelope, intended for demanding RF power service.

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
600 mA
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
Transconductance
0.0041 S
Max plate voltage
3000 V
Max screen voltage
700 V
Max plate dissipation
14 W
Max screen dissipation
3 W
Max cathode current
75 mA
Rectifier max heater-cathode voltage
450 V
Rectifier warm-up time
45 s

Published ratings and characteristics mapped semantically; 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

  • PeakCathodeCurrentPulse

    2 A

    Pulse

  • Altitude

    70000 ft

    SpecialTest

  • ImpactShock

    500 g

  • VibrationalAcceleration

    50 g

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

  • Limits Of Applied Voltage

    0.3 VOLTS

    PublishedTable

  • Heater Negative With Respect To Cathode

    450 VOLTS

    PublishedTable

  • Heater Positive With Respect To Cathode

    450 VOLTS

    PublishedTable

  • Dc Plate Voltage

    0 VOLTS

    PublishedTable

  • Dc Grid 2 Voltage

    700 VOLTS

    PublishedTable

  • Plate Dissipation

    14 WATTS

    PublishedTable

  • Grid 2 Dissipation

    3 WATTS

    PublishedTable

  • Dc Cathode Current

    75 mA

    PublishedTable

  • Peak Cathode Current -Pulse

    2 AMPS

    PublishedTable

  • Grid Resistance

    0.1 MEGOHM

    PublishedTable

  • Plate Voltage

    250 VOLTS

    PublishedTable

  • Grid 2 Volts

    2 VOLTS

    PublishedTable

  • Plate Current

    45 mA

    PublishedTable

  • Grid 2 Current

    3.5 mA

    PublishedTable

  • Transconductance

    100 MHOS

    PublishedTable

  • Plate Voltage

    750 VOLTS

    PublishedTable

  • Grid 2 Voltage

    325 VOLTS

    PublishedTable

  • Grid 1 Bias Voltage

    100 VOLTS

    PublishedTable

  • Pulse Voltage — E9K

    100 VOLTS

    PublishedTable

  • Pulse Plate Current

    0.75 AMP

    PublishedTable

  • Grid 1 Volts (Negative)

    1 VOLTS

    PublishedTable

Data set 03

196X Bendix

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    600 mA

  • Peak cathode current

    2 A

    PulseService

Other

  • Maximum plate/anode voltage

    3000 V

  • Maximum heater-cathode voltage

    450 V

  • Maximum plate voltage

    3000 V

    PulseService