The cathode is a thoriated tungsten filament.
The F-8388 has a grooved, heavy walled anode capable of dissipating 100 Kw when evaporation cooled by water. Maximum CW ratings apply up to 30 mc.
| GENERAL DESCRIPTION |
|
The F-8388 is a general purpose metal and ceramic triode for use as amplifier, oscillator or Class B modulator under CW or pulsed conditions. The cathode is a thoriated tungsten filament. The F-8388 has a grooved, heavy walled anode capable of dissipating 100 Kw when evaporation cooled by water. Maximum CW ratings apply up to 30 mc. |
| TECHNICAL SPECIFICATIONS | ||||
| ELECTRICAL | ||||
| Filament Voltage | 14.5 volts | |||
| Filament Current | 330 amperes | |||
| Filament Starting Current | 1,000 amperes | |||
| Filament Heating Time, minimum | 15 seconds | |||
| Filament Cold Resistance | 0.006 ohms | |||
| Amplification Factor | 20 | |||
| Inter-electrode Capacitance Grid-Plate Grid-Filament Plate-Filament |
85 μμf 120 μμf 6.0 μμf |
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| MECHANICAL | ||||
| Mounting Position | Vertical, Anode down | |||
| Plate Dissipation | 100 kilowatts | |||
| Max. Ceramic & Seal Temperature | 250°C | |||
| Evaporation Rate | .75 gpm | |||
| Net Weight, approx. | 71 lbs. | |||
| Specifications may change without notice | ||||
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Continental | 418 A | 100 |
| 419 C | 250 | |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Kennetron | ||
| PRICE LEVEL (US$) | |||||
| 1 | 2 | 3 | 4 | 5 | 6 |
| 0 - 10 | 10 - 100 | 100 - 1000 | 1000 - 10,000 | 10,000 - 50,000 | 50,000 - 100,000 |