Tube-number record
7K7
0 archive entries
7K7 is a tube type in the TubeDatabase archive (class: Duodiode High-Mu Triode). Recorded specifications: brand Sylvania, construction Triode, socket Loctal, maximum plate voltage 300 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassDuodiode High-Mu Triode
BaseLoctal
Filament7 V @ 320 mA
Construction
Primary TypeTriode
EnvelopeT-9
SectionsTriode and Duodiode with separate cathodes
Filament / Heater
Heater NotesNominal ratings; 6.3V and 300mA under typical operation.
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250 V | 1600 | 41000 | 70 | 2.3 mA |
Application Notes
Differs from usual diode triode by having separate cathodes for diode and triode sections. Triode characteristics are identical to one section of Type 7F7.
Datasheets
Datasheet: 7K7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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