Data set 01
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Diode
Other
Typical Anode Voltage
100 V
Typical Anode Current
2.5 mA
Diode (NOT rectifier) ·Diode
FP400
Experimental high-vacuum diode designed for laboratory study of thermionic emission, space charge, and magnetic-field effects rather than normal receiver operation.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B4B
- Base pins
- 4
- Nominal heater
- 4 V / 2.25 A
Description
The FP400 is a diode designed for experimental study of electrical discharges in high vacuum, including space-charge, emission, and magnetic-field effects.
Socket description
Medium 4-pin bayonet
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B4B
- Base pins
- 4
- Nominal heater voltage
- 4 V
- Nominal heater current
- 2.25 A
- 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
Diode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 125 V
- Max plate dissipation
- 15 W
Anode ratings mapped semantically to plate fields.
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.