It is recommended for RF linear power amplifier service for television linear amplifier service, and as a switch tube for pulsed regulator service.
| GENERAL DESCRIPTION |
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The 4CW25,000A is a tetrode intended for use in audio or radio frequency applications. It is recommended for RF linear power amplifier service for television linear amplifier service, and as a switch tube for pulsed regulator service. |
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| TECHNICAL SPECIFICATIONS | |
| Plate Dissipation (Max.) | 25,000 watts |
| Screen Dissipation (Max.) | 450 watts |
| Grid Dissipation (Max.) | 200 watts |
| Frequency for Max. Ratings (CW) | 110 MHz |
| Cooling | Water and Forced Air |
| Filament Voltage Current |
Thoriated Tungsten 6.3 volts 160 amperes |
| Capacitances (Gnd. Cath. Connection) Input Output Feed-through |
160 pF 24.5 pF 1.5 pF |
| Capacitances (Gnd. Grid Connection) Input Output Feed-through |
67 pF 25.5 pF 0.2 pF |
| Amplification Factor (g1-g2) | 4.5 |
| Base | Special, Coaxial |
| Recommended Air-System Socket | SK-300A |
| Maximum Seal & Envelope Temperature | 250°C |
| Maximum Length | 12.69 in; 322.00 mm |
| Maximum Diameter | 4.75 in; 121.00 mm |
| Weight (approximate) | 13.5 lb; 6.1 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 |
| Marconi | B 6131 | 250 |
| B 6124 | 300 | |
| B 6126 | 300 | |
| B 6127 | 500 | |
| B 6128 | 500 | |
| B 6128S | 500 | |
| HCJB Global | HC 500 | 500 |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Eimac | Econco | Richardson Electronics |
| e2v technologies | ||
| Penta Laboratories | ||
| 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 |