Data set 01
1953 Amperex
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Other
Supply voltage maximum
300 V
Supply voltage at zero plate current
450 V
Tuning Indicator ·TuningIndicator
1N3
Electron-ray visual indicator for receiver tuning or electrical level indication, using a fluorescent display whose pattern changes with control voltage.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- 8
- Nominal heater
- 1.4 V / 25 mA
Description
1N3 is a TuningIndicator device. Subminiature battery tuning indicator; source explicitly co-designates 1N3/DM71 family and emphasizes 25 mA filament consumption. Published values from the supplied page were preserved in the technical output, and reference-only entries were not supplemented from outside sources.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- 8
- Nominal heater voltage
- 1.4 V
- Nominal heater current
- 25 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- Yes
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
Tuning Indicator
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 300 V
- Max plate dissipation
- 0.045 W
- Max cathode current
- 0.3 mA
Published ratings/characteristics promoted where applicable; additional values 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.
Data set 02
1963 Amperex Condensed
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Other
Supply and screen voltage
85 V
Screen current
0.17 mA
Grid bias for end of control range
-10 V