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1F1

Current-regulating ballast device designed for two-volt battery-radio filament strings, regulating approximately 0.72 ampere.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: UX4
Base pins: -
Nominal heater: -

Description

Current-regulating ballast device for 2-volt battery-radio filament strings.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: UX4
Base pins: -
Nominal heater voltage: -
Nominal heater current: 720 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

Ballast

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Current-regulating ballast/reference source; no ordinary electrode ratings/characteristics table is published, so promoted active-section fields are intentionally not inferred.

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

1938 National Union

Published operating points and test conditions from this source.

SECTION 1

Ballast

Other

using the
2 volt
Published source value; see source line context.
(
3.2 volts
Published source value; see source line context.
dry-cells in series. The
1 amperes
Published source value; see source line context.
with
0.7 volts
Published source value; see source line context.
adding up to
0.72 amperes
Published source value; see source line context.

Characteristic

Current
0.72 amperes
Published source value; see source line context.