8D301

High-vacuum ten-output magnetron beam-switching tube, co-designated 6703/8D-301, designed to steer an electron beam sequentially among multiple output electrodes.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 300 mA

Description

High-vacuum ten-output magnetron beam-switching tube; 6703 / 8D-301 shared designation.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
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

MicrowaveTRSwitch

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Special-purpose display/switching section. Published non-promoted ratings are retained in TUBE_SECTION_PARAMETER.

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 Burroughs

Published operating points and test conditions from this source.

SECTION 1

MicrowaveTRSwitch

Other

Target Voltage
300 V
Spade Voltage
200 V
Grid Voltage
200 V
Heater-Cathode Voltage
90 V
Individual Target Dissipation
1 W
Typical Cathode Current
7.5 mA
Test circuit

Capacitance

Any Spade to All Other Elements Capacitance
4 pF
Any Target to All Other Elements Capacitance
4 pF
Odd Grids to All Other Elements Capacitance
10 pF
Even Grids to All Other Elements Capacitance
10 pF
Cathode to All Other Elements Capacitance
6 pF