Tube-number record
7308
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7308 is a tube type in the TubeDatabase archive (class: Duo Triode). Recorded specifications: brand SYLVANIA, construction Triode, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 1.65 W. The archive does not yet hold a photographed example of this type.
BrandSYLVANIA
ClassDuo Triode
BaseNoval (B9A)
Filament6.3 V @ 335 mA
Construction
Primary TypeTriode
EnvelopeT-6 1/2
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation1.65 W
Grid 1 Voltage110 V
Cathode Current22 mA
H-C Voltage120 V
Audio Performance
Key Features
- Long life
- Ruggedized construction
- High transconductance
- Low noise
- Low microphonics
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Recommended | 90 V | 11500 | — | — | 12 mA |
| Alternative | 100 V | 12500 | 250 | 33 | 15 mA |
Application Notes
Designed for use as a multivibrator, cathode follower, VHF amplifier and VHF cascode amplifier. Similar to Sylvania Type 6922.
Datasheets
Datasheet: 7308.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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