The 4CX15,000A / 8281 is also recommended for radio-frequency linear power amplifier service, and for VHF television linear amplifier service.
| GENERAL DESCRIPTION |
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The 4CX15,000A / 8281 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 4CX15,000A / 8281 at full ratings up to 110 MHz, and at reduced ratings, to 225 MHz. The 4CX15,000A / 8281 is also recommended for radio-frequency linear power amplifier service, and for VHF television linear amplifier service. |
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| TECHNICAL SPECIFICATIONS | |
| Plate Dissipation (Max.) | 15,000 watts |
| Screen Dissipation (Max.) | 450 watts |
| Grid Dissipation (Max.) | 200 watts |
| Frequency for Max. Ratings (CW) | 110 MHz |
| Cooling | Forced Air |
| Filament Voltage Current |
Thoriated Tungsten 6.3 volts 160 amperes |
| Capacitances (Grounded Cath. Connection) Input Output Feed-through |
160.5 pF 24.5 pF 1.5 pF |
| Capacitances (Grounded Grid Connection) Input Output Feed-through |
67.0 pF 25.5 pF 0.2 pF |
| Amplification Factor (g1-g2) | 4.5 |
| Base | Special, Coaxial |
| Recommended Air-System Socket | SK-300A |
| Recommended Air Chimney | SK-316 |
| Maximum Seal & Anode Core Temperature | 250°C |
| Maximum Length | 9.38 in; 238.00 mm |
| Maximum Diameter | 7.58 in; 193.00 mm |
| Weight (approximate) | 12.8 lb; 5.80 kg |
| Operating Position | Vertical |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Bauer | 710C | 10 |
| CCA Electronics | AM 10,000F | 10 |
| AM 15,000F | 15 | |
| AM 50,000D | 15 | |
| Continental Electronics | 416 D | 10 |
| 417 D | 50 | |
| Elcor | SW-40 K | 40 |
| SW-50 K | 50 | |
| Energy-Onix | HF-10K2 | 10 |
| Gates | HC-114 | 250 |
| NEC Corporation | HFB-7840 | 10 |
| RIZ-Transmitters | OR 10 K-06 | 10 |
| 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 |