7800
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BrandAmperex
ClassHigh vacuum power triode
Construction
Primary Typetriode
EnvelopeExternal plate with integral radiator
Sectionssingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage13000 V
Plate Dissipation15000 W
Grid 1 Voltage-1500 V
Cathode Current4800 mA
Audio Performance
Power Output19200 W
Key Features
- external plate type
- forced-air cooling
- integral radiator
- thoriated tungsten filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Class C Telegraphy | 12000V | 25000 | - | 33 | 4500mA |
| RF Class C Plate Modulation | 10000V | 25000 | - | 33 | 3500mA |
| AF Class B Modulator (per tube) | 10000V | 25000 | - | 33 | 1600mA |
Application Notes
The 7800 is designed primarily for use as an RF or AF amplifier and oscillator at frequencies up to 30 mc.
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