The anode is rated for 20 kW dissipation and incorporates a highly efficient cooler of new design, which significantly reduces air pressure and flow requirements and produces low acoustical noise.
| GENERAL DESCRIPTION |
|
The 4CX20,000B is intended for use as a Class C RF power amplifier in AM broadcast service, for use as a push-pull audio amplifier or modulator, or as a pulse modulator. The anode is rated for 20 kW dissipation and incorporates a highly efficient cooler of new design, which significantly reduces air pressure and flow requirements and produces low acoustical noise. |
| TECHNICAL SPECIFICATIONS | |
| Plate Dissipation (Max.) | 20,000 watts |
| Screen Dissipation (Max.) | 450 watts |
| Grid Dissipation (Max.) | 200 watts |
| Frequency for Max. Ratings (CW) | 30 MHz |
| Cooling | Forced Air |
| Filament Voltage Current |
Thoriated Tungsten Mesh 10.0 volts 140 amperes |
| Capacitances (Grounded Cath. Connection) Input Output Feed-through |
190 pF 23.5 pF 1.5 pF |
| Capacitances (Grounded Grid Connection) Input Output Feed-through |
83 pF 24.5 pF 0.2 pF |
| Amplification Factor (g1-g2) | 6.7 |
| Base | Special, Coaxial |
| Recommended Air-System Socket | SK-320 |
| Recommended Air Chimney | SK-326 |
| Maximum Seal & Anode Core Temperature | 250°C |
| Maximum Length | 9.84 in; 249.90 mm |
| Maximum Diameter | 8.86 in; 225.04 mm |
| Weight (approximate) | 20.0 lb; 9.06 kg |
| Operating Position | Vertical, base up or down |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| NEC Corporation | HFB-8047 | 50 |
| RIZ Transmitters | OR 20 K-01/A | 20 |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Eimac | Econco | Richardson Electronics |
| Penta Laboratories | 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 |