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GRD7

Directly heated guard-ring demonstration diode with coaxial electrodes, designed for educational investigation of saturated thermionic current and related electron-flow phenomena.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 6 V / -

Description

Directly heated guard-ring demonstration diode with cylindrical coaxial electrodes and tungsten filament.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: 8
Nominal heater voltage: 6 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

1 physical section, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

Max plate voltage: 300 V
Max plate dissipation: 5 W

Published Ferranti ratings and characteristics promoted where applicable; additional electrical, pulse, regulator, microwave, and operating data 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

1963 Ferranti

Published operating points and test conditions from this source.

SECTION 1

Diode

Application

Application
Educational saturated-diode demonstration / stabilized AC supply

Other

Filament voltage maximum
7 V
Anode voltage maximum
300 V
Anode dissipation maximum
5 W

Construction

Filament diameter
0.125 mm
Effective filament length
14.5 mm
Anode internal diameter
6.5 mm
Anode length
14.5 mm