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Diode (NOT rectifier) ·Diode-Diode

7631

Rugged long-life double diode designed for clamping and pulse-shaping applications, with construction optimized for cutoff operation and frequent heater switching.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / -

Description

The 7631 is a seven pin 211 glass construction double diode suitable for clamping and pulse shaping applications, The use of a special rugged electrode construction menufactured by means of semi-automatic assembly technidues contributes to a low catestrophic failure rate. The cathode sleeve is made of a special alloy to inhibit the growth of cathode interface resistance during longz periods of operation under cut-off conditions and the pure tungsten heater bas been designed to withstand frequent heater switching (sec note)., In addition the heater-cathode construction and materials ensure very low levels of leskage throughout life, The glass basc and envclope sirain patterns are tightly

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
-
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

2 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
360 V
Rectifier max heater-cathode voltage
300 V

Primary electrical section; identical repeated sections compressed where applicable.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second physical diode section added in approved section-structure reconciliation.

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

1954 STC Brimar

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • voltage 120% of nominal value: heater-cathode voltage 240V r.m.s:

    240 V

    voltage 120% of nominal value: heater-cathode voltage 240V r.m.s:

  • Voltage (ac or dc) 6.3 volts

    6.3 V

    Voltage (ac or dc) 6.3 volts

  • Hexinum heater cathode VOLEAEE ecescasscosossssessa 300 volts

    300 V

    Hexinum heater cathode VOLEAEE ecescasscosossssessa 300 volts

  • Haxinmun peak inverse anode vOlEoSCG veseoncesccasess 360 vOlts

    360 V

    Haxinmun peak inverse anode vOlEoSCG veseoncesccasess 360 vOlts