| GENERAL DESCRIPTION |
|
Coaxial tetrode in metal-glass-ceramic technology, vapor-cooled, suitable for single-sideband communications transmitters up to 100 kW, broadcast transmitters up to 200 kW medium and short wave, and for modulators in transmitters up to 400 kW. | |
| TECHNICAL SPECIFICATIONS | |
| HEATING | |
| Heater voltage | 21 V |
| Heater current | ±350 A |
| Heating | direct |
| Cathode | thoriated tungsten |
| CHARACTERISTICS | |
| Emission current | 280 A |
| Amplification factor of screen grid | 4,0 |
| Transconductance | 130 mA/V |
| CAPACITANCES | |
| Cathode/control grid | ±265 pF |
| Cathode/screen grid | ±35 pF |
| Cathode/anode | ±1,9 pF |
| Control grid/screen grid | ±360 pF |
| Control grid/anode | ±9,0 pF |
| Screen grid/anode | ±118 pF |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Philips | 8FZ 521 (FB 010) | 300 |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| 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 |