Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - Beam (NOT sweep) (over 1000V 100W) ·BeamPower

7650

Beam-power output tube intended for high-fidelity audio power amplification, providing substantial Class-AB output from a compact receiving-tube envelope.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
-
Nominal heater
6.3 V / 7.85 A

Description

Rugged forced-air-cooled UHF beam-power tube for AF power/modulator and linear, plate-modulated, FM, or Class-C RF amplifier/oscillator 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
-
Nominal heater voltage
6.3 V
Nominal heater current
7.85 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
Amplification factor
13
Max plate voltage
3000 V
Max screen voltage
1200 V
Max plate dissipation
600 W
Max cathode current
500 mA

Published ratings/characteristics promoted from supplied datasheet.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

  • Heater or filament voltage

    6.3 V

    Published nominal value

  • Heater or filament current

    7.5 A

    Published nominal/aggregate value

  • Amplification factor

    13

    Published operating characteristic

Other

  • Maximum plate dissipation

    600 W

    Published maximum rating

  • CW power output

    800 W

    400 MHz

  • PEP output

    680 W

    30 MHz

  • Maximum frequency

    1215 MHz

    Published

Data set 02

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Maximum DC Plate Voltage

    3000 V

    Forced-air-cooled RF power service

  • Maximum DC Screen Voltage

    1200 V

    Forced-air-cooled RF power service

  • Maximum-Signal DC Plate Current

    500 mA

    Forced-air-cooled RF power service

  • Plate Dissipation

    600 W

    Forced-air-cooled RF power service

  • Typical DC Plate Voltage

    3000 V

    Forced-air-cooled RF power service

  • Maximum-Signal Power Output

    1600 W

    Forced-air-cooled RF power service

  • Useful Power Output at 1215 MHz

    800 W

    Forced-air-cooled RF power service

Characteristics

  • Mu Factor, Screen to Control Grid

    13

    Forced-air-cooled RF power service

  • Grid-No.1 to Plate Capacitance

    0.11 pF

    Forced-air-cooled RF power service