Data set 01
1958 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Ballast
Characteristics
Operating current
150 mA
Voltage range minimum
90 V
Voltage range maximum
140 V
Specialized - Ballast ·Ballast
D15
Ballast current regulator intended for series heater or filament circuits, providing automatic resistance variation to reduce the effect of changing supply voltage.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- -
Description
Current stabiliser/barretter for 0.15 A series-heater valve strings.
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
- -
- 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
Ballast
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Barretter/current stabilizer; operating range 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.