Tube-number record
7258
0 archive entries
7258 is a tube type in the TubeDatabase archive (class: Receiving Tube). Recorded specifications: brand Sylvania, construction Pentode, base Miniature Button 9-Pin, socket Noval (B9A), maximum plate voltage 330 V, and maximum plate dissipation 2.8 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassReceiving Tube
BaseNoval (B9A)
Filament12 V @ 210 mA
Construction
Primary TypePentode
Envelope6-2
Base MaterialMiniature Button 9-Pin
SectionsDouble
Filament / Heater
Heater NotesHeater current at 13.5 Volts
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 150 V | 4500 | 4700 | 21 | 15 mA |
| Pentode Section | 125 V | 7800 | 170000 | — | 12 mA |
Application Notes
The pentode section may be used as an RF, IF or reactance tube. The triode section may be used as a low frequency oscillator or general purpose amplifier.
Datasheets
Datasheet: 7258.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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