Specialized - Ballast ·Ballast
B1B1E
Ballast lamp designed to maintain substantially constant filament current in telephone repeater-valve circuits despite changes in supply voltage.
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- -
Description
Ballast lamp for maintaining substantially constant current in repeater-valve filament circuits.
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
- -
- 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
No fixed ratings are recorded for this section.
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.