Tube-number record
E 414
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E 414 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Philips, construction Triode, socket Special / none, and maximum plate voltage 150 V. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassTriode
BaseSpecial / none
Filament4 V @ 0.9 mA
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirekt geheizte Kathode
Absolute Maximum Ratings
Plate Voltage150 V
Audio Performance
Key Features
- Low microphony (Selbstklingens)
- Designed for transformer amplification
- Indirekt geheizte Kathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Transformer Coupling | 150 V | 2000 | 7000 | 14 | 6 mA |
| Distortion-free Amplification | 120 V | — | — | — | — |
Application Notes
Specifically designed for transformer amplification where microphony (Selbstklingens) issues arise, such as in microphone amplifiers. Recommended for use with Philips N.F. Transformer No. 4003 for 42x amplification.
Datasheets
Datasheet: E414.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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