Data set 01
1937 Osram Valves
Published operating points and test conditions from this source.
SECTION 1
Ballast
Characteristics
Heater/filament current
300 mA
Regulated current
300 mA
Specialized - Ballast ·Ballast
304
OSRAM barretter current regulator designed for automatic current stabilization in series-connected electrical circuits.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- B4
- Base pins
- 4
- Nominal heater
- -
Description
304: OSRAM barretter current regulator. The complete approved OSRAM sheet was read for construction, characteristics, operating data, and application guidance.
Socket description
European 4-pin base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B4
- Base pins
- 4
- Nominal heater voltage
- -
- 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
Ballast
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Published characteristics and maximum ratings promoted where applicable; additional 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.