Tube-number record
7720
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BrandGeneral Electric
ClassTriode
Filament6.3 V @ 240 mA
Construction
Primary TypeTriode
EnvelopeMetal-Ceramic
SectionsSingle
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation1 W
Grid 1 Voltage50 V
Cathode Current11 mA
H-C Voltage50 V
Audio Performance
Power Output0.1 W
Key Features
- High-mu triode
- Ceramic-and-metal planar construction
- Ultra-high-frequency range oscillator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Average Characteristics | 100 V | 11500 | — | — | 9 mA |
| Average Characteristics | 150 V | 10500 | — | 90 | 7.5 mA |
| UHF Oscillator Service | 150 V | — | — | — | 4 mA |
Application Notes
Primarily intended for use as an oscillator in the ultra-high-frequency range. Absolute-Maximum ratings are limiting values. Envelope temperature should be maintained below 175 C for long life.
Datasheets
Datasheet: 7720.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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