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Voltage Radio Detector Converter ·Rectifier

9004

Acorn UHF diode for rectifier, detector, and measuring service at very high frequencies. Its compact construction and roughly 850 MHz resonance suit specialized RF detection and measurement.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
4BJ
Socket code
B7G
Base pins
4
Nominal heater
6.3 V / 150 mA

Description

Acorn UHF diode for rectifier, detector, or measuring service; resonant frequency about 850 MHz.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
4BJ
Socket code
B7G
Base pins
4
Nominal heater voltage
6.3 V
Nominal heater current
150 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

4BJ - 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

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier nominal output current
5 A

117-V RMS AC plate rating and 5-mA DC output rating 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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Heater/filament voltage

    6.3 V

    Published heater/filament rating

  • Heater/filament current

    150 mA

    Published heater/filament rating

Other

  • DC output current

    5 mA

    RectifierService

  • RMS supply voltage per plate

    117 V

    RectifierService

Data set 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    150 mA

  • MaximumOperatingFrequency

    850 MHz

    Approximate/useful limit

  • Resonant Frequency

    850 MHz

Data set 03

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Heater voltage

    6.3 V

  • Heater current

    150 mA

  • AC plate voltage maximum RMS

    117 V

  • DC output current maximum

    5 mA

Capacitance

  • Plate-to-cathode capacitance

    1.3 pF

Characteristic

  • Resonant frequency approximate

    850 MHz