The 4CW25,000A is recommended for radio-frequency linear power amplifier service, for television linear amplifier service, and as a switch tube for pulsed regulator service.
| GENERAL DESCRIPTION |
|
The 4CW25,000A is a ceramic/metal power tetrode intended for use in audio or radio frequency applications. It features a new type of internal mechanical structure which results in higher rf operating efficiency. Low rf losses in this mechanical structure permit operation of the 4CW25,000A at full ratings up to 110 MHz, and at reduced ratings, to 225 MHz. The 4CW25,000A is recommended for radio-frequency linear power amplifier service, for television linear amplifier service, and as a switch tube for pulsed regulator service. |
|
| 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 | Kennetron | |
| 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 |