7C27
0 Tubes in archive
BrandFederal Telephone and Radio Corporation
ClassHigh Vacuum Triode
Construction
Primary Typetriode
Envelopeglass/metal
Base Materialmetal/radiator
Sectionssingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation3000 W
Grid 1 Voltage-1000 V
Cathode Current2000 mA
Audio Performance
Power Output5150 W
Key Features
- Power Amplifier
- Oscillator
- Thoriated Tungsten Filament
- Forced-air cooling
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C R-F Power Amplifier and Oscillator | 4000V | - | - | 27 | 1500mA |
Application Notes
In push-pull grounded-grid amplifier with 3 Kw driver. All values are for one tube.
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