Data set 01
9999 Mixed G 2000
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Plate Voltage
150 V
Voltage - Triode (single) ·Triode
A414
Philips Miniwatt A414 is a directly heated, low-microphony receiving triode designed for detector and amplifier service, especially in ultrashort-wave receivers. Its ruggedized construction reduces microphone effects, while its economical 4 V, 80 mA filament permits direct operation from a storage battery.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 4 V / 80 mA
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
- 4 V
- Nominal heater current
- 80 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
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 7000 Ω
- Transconductance
- 0.002 S
- Amplification factor
- 14
Philips Miniwatt A414 low-microphony, directly heated receiving triode. General plate operating range 20–150 V; recommended detector plate range 20–100 V. Typical plate current 3 mA; grid bias -4.5 V at 150 V plate voltage (-3 V at 100 V). Published grid-to-plate capacitance approximately 2.5 pF. These are operating conditions, not explicitly stated absolute maximum plate voltage.
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.