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Specialized - Ballast ·Ballast

C12

Hydrogen-filled 200 mA barretter for series heater chains, automatically increasing resistance as voltage rises to maintain substantially constant current over selectable regulating ranges.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
P30
Socket code
-
Base pins
-
Nominal heater
-

Description

Philips C12 is a 200 mA barretter/current-regulator tube used in series heater circuits to hold receiver heater current nearly constant over a specified voltage range.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
P30
Socket code
-
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

P30 - 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.

Published ratings and characteristics promoted where semantically applicable; additional published values retained as section 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

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Ballast

Other

  • Regulated current

    200 mA

    Published datasheet value

  • Control/regulating range

    80-200 / 35-100 V

    Published datasheet value

  • Maximum working voltage

    - to 200 V

    Published datasheet value

  • Maximum voltage at switch-on

    - to 250 V

    Published datasheet value

  • Alternate maximum working voltage

    - to 100 V

    Contacts A-C

  • Alternate maximum switch-on voltage

    - to 160 V

    Contacts A-C

Construction

  • Construction/use

    dual connection ranges

    Published datasheet value