Skip to main content

Diode (NOT rectifier) ·Diode

DA90

Battery-oriented single diode with a 1.4 V heater and high resonant frequency, intended for detector and low-level signal rectification in portable equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
Miniature
Socket code
B7G
Base pins
7
Nominal heater
1.4 V / 150 mA

Description

Single indirectly heated diode primarily intended for battery-operated equipment, with a 1.4 V heater, about 1 GHz resonant frequency and 330 V peak inverse voltage rating.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Miniature
Socket code
B7G
Base pins
7
Nominal heater voltage
1.4 V
Nominal heater current
150 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Miniature - 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

Diode

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
330 V
Rectifier nominal output current
0.5 mA
Rectifier peak forward current
5 mA
Rectifier max heater-cathode voltage
140 V

Single diode; P.I.V. 330 V and 0.5 mA maximum anode current.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Diode

Capacitance

  • Anode-cathode capacitance

    0.4 pF

  • Anode-heater capacitance

    0.8 pF

  • Heater-cathode capacitance

    0.6 pF

Characteristic

  • Resonant frequency approximate

    1000 MHz

Other

  • Peak inverse voltage maximum

    330 V

  • Anode current maximum

    0.5 mA

  • Heater-cathode voltage maximum

    140 V

Data set 02

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

  • Anode-cathode capacitance

    0.4 pF

    Published datasheet value

  • Anode-filament capacitance

    0.8 pF

    Published datasheet value

  • Cathode-filament capacitance

    0.6 pF

    Published datasheet value

  • Resonant frequency approximate

    1000 Mc/s

    Published datasheet value

Other

  • Inverse peak anode voltage maximum

    - to 330 V

    Published datasheet value

  • D.C. anode current maximum

    - to 0.5 mA

    Published datasheet value

  • Peak anode current maximum

    - to 5 mA

    Published datasheet value

  • Cathode-to-heater voltage maximum

    - to 140 V

    Published datasheet value