Tube-number record
7900
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BrandAmperex
Classtriode
Construction
Primary TypeTriode
EnvelopeGlass/Metal radiator
Base MaterialSpecial
Sections1
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage6000 V
Plate Dissipation4000 W
Grid 1 Voltage-1000 V
Cathode Current1500 mA
Audio Performance
Key Features
- forced air cooled
- platinum grid
- brazed and silver plated radiator
- accurately dimensioned for cavity configurations
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Power Amplifier and Oscillator - Class C Telegraphy (Grounded Filament) | 6000 V | 15000 | — | 32 | 1500 mA |
| RF Power Amplifier - Class B Carrier Conditions | 6000 V | — | — | — | 990 mA |
Application Notes
The filament center tap pin must not be used for filament current supply. Particular attention must be given to installation design when using above 110 mc.
Datasheets
Datasheet: 7900.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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