Specialized - Switching Tube ·ThermalDelaySwitch
S1021K
Thermal-delay switching device of the S1021 family. Available source material supports delayed switching service without enough detail for a narrower operating description.
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 6.3 V / 500 mA
Description
These miniature thermal delay switches have been designed to provide delay between the application of heater voltage and anode voltage in indirectly heated valves and mercury vapour rectifiers.
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
- 6.3 V
- Nominal heater current
- 500 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
ThermalDelaySwitch
No fixed ratings are recorded for this section.
Special-valve ratings and characteristics retained as parameters where applicable.
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.