Tube-number record
252A
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BrandWestern Electric
ClassModerate-power filamentary triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialMedium four-pin thrust base
Sections1
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage500 V
Grid 1 Voltage10 V
Cathode Current90 mA
Audio Performance
Power Output8 W
Key Features
- Moderate-power filamentary triode
- Audio-frequency amplifier
- Oscillator
- Modulator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical (300V) | 300 V | 2250 | 2300 | 5.08 | 19 mA |
| Typical (400V) | 400 V | 3100 | 1650 | 5.12 | 44 mA |
| Typical (450V) | 450 V | 3450 | 1500 | 5.14 | 60 mA |
Application Notes
When alternating current is used for heating the filament, the grid and plate returns should be connected to a center tap on the secondary of the filament transformer. For horizontal mounting, the plane of the filament should be vertical.
Datasheets
Datasheet: 252A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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