| GENERAL DESCRIPTION |
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The 8973 is a power tetrode designed for very-high-powered medium-frequency or high-frequency broadcast service and very-low-frequency communication in the half-megawatt power range. The 8973 has a thoriated-tungsten filamen mounted on water-cooled supports. The maximum anode dissipation rating is 1400 kW steady state. Large-diameter coaxial terminals are used for the control grid and the RF filament terminals. Filament power and filament support cooling-water connections are made through special couplings with threaded clamping rings. |
| TECHNICAL SPECIFICATIONS | |
| Plate Dissipation (Max.) | 1,000,000 watts |
| Screen Dissipation (Max.) | 7,500 watts |
| Grid Dissipation (Max.) | 2,000 watts |
| Frequency for Max. Ratings (CW) | 110 MHz |
| Maximum Useful Frequency (CW) | 210 MHz |
| Cooling | Water and Forced Air |
| Filament Voltage Current |
Thoriated Tungsten Mesh 16.3 volts 600 amperes |
| Capacitances (Grounded Cath. Connection) Input Output Feed-through |
1000 pF 165 pF 5.0 pF |
| Amplification Factor (g1-g2) | 4.5 |
| Base | Special Coaxial |
| Recommended Filament Power/Water Connectors (2 required) |
SK-2310 |
| Recommended Filament RF Connector (1 required) |
SK-2315 |
| Recommended Filament Anode Water Connectors (2 required) |
SK-2320 or SK-2321 or SK-2322 |
| Maximum Seal & Envelope Temperature | 200°C |
| Maximum Length | 18.75 in; 476.20 mm |
| Maximum Diameter | 17.03 in; 432.60 mm |
| Weight (approximate) | 153.0 lb; 69.5 kg |
| Operating Position | Vertical, base down |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| HCJB Global | HC 500 | 500 |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Eimac | Richardson Electronics | |
| 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 |