Tube-number record
7C7
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7C7 is a tube type in the TubeDatabase archive (class: Sharp Cut-off RF Pentode). Recorded specifications: brand Sylvania, construction Pentode, socket Loctal, maximum plate voltage 300 V, and maximum plate dissipation 1.06 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassSharp Cut-off RF Pentode
BaseLoctal
Filament7 V @ 160 mA
Construction
Primary TypePentode
EnvelopeT-9
Filament / Heater
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1.06 W
Grid 2 Voltage100 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 100V Operation | 100 V | 1225 | 1200000 | — | 1.8 mA |
| 250V Operation | 250 V | 1300 | 2000000 | — | 2 mA |
Application Notes
Sylvania Type 7C7 is a sharp cut-off pentode with a low heater current rating. In other respects it is similar to the older Type 6J7GT. Design data for use in resistance coupled circuits appears on Page 50.
Datasheets
Datasheet: 7C7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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