Tube-number record
272A
0 archive entries
272A is a tube type in the TubeDatabase archive (class: Low-power triode). Recorded specifications: brand Western Electric, construction Triode, socket 5-pin, and maximum plate voltage 180 V. The archive does not yet hold a photographed example of this type.
BrandWestern Electric
ClassLow-power triode
Base5-pin
Filament10 V @ 320 mA
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesAC or DC operation. Maximum heater-to-cathode voltage 90 V.
Absolute Maximum Ratings
Plate Voltage180 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 80 V | 1220 | 5400 | 6.6 | 8.7 mA |
| Typical Operation | 100 V | 950 | 6300 | 6 | 6.6 mA |
| Maximum Operating Conditions | 180 V | 760 | 7200 | 5.5 | 6.2 mA |
Application Notes
Radio-frequency antenna-coupling amplifier; Audio-frequency amplifier where small power outputs are required; Detector or modulator.
Datasheets
Datasheet: 272A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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