Voltage Tetrode ·Tetrode
E5
Subminiature directly heated electrometer tetrode for extremely small-current measurement. Its tiny filament demand and high input resistance suit sensitive portable instrumentation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 1.25 V / 10 mA
Description
Subminiature directly heated electrometer tetrode.
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
- 1.25 V
- Nominal heater current
- 10 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
Tetrode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 80000 Ω
- Transconductance
- 0.000015 S
- Amplification factor
- 1.2
- Max cathode current
- 0.25 mA
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.