Tube-number record
242A
0 archive entries
242A is a tube type in the TubeDatabase archive (class: Filamentary air-cooled triode). Recorded specifications: brand Western Electric, construction Triode, socket Special / none, maximum plate voltage 1250 V, and maximum plate dissipation 85 W. The archive does not yet hold a photographed example of this type.
BrandWestern Electric
ClassFilamentary air-cooled triode
BaseSpecial / none
Construction
Primary TypeTriode
Envelopeglass
Sectionssingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage1250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Audio | 1250 V | 3600 | 3500 | 12.5 | 60 mA |
| Class A Audio | 1000 V | — | — | — | 75 mA |
| Class A Audio | 750 V | — | — | — | 100 mA |
Application Notes
If mounted horizontally the plane of the filament should be vertical. A free circulation of air must be provided to insure adequate cooling of the glass.
Datasheets
Datasheet: 242A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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