The 4CX250B / QEL2/275 is designed to operate with a heater voltage of 6.0 volts.
| GENERAL DESCRIPTION |
|
The 4CX250B / QEL2/275 has a maximum plate dissipation rating of 250 watts and a maximum input-power rating of 500 watts. The 4CX250B / QEL2/275 is designed to operate with a heater voltage of 6.0 volts. |
| TECHNICAL SPECIFICATIONS | |
| Plate Dissipation (Max.) | 250 watts |
| Screen Dissipation (Max.) | 12 watts |
| Grid Dissipation (Max.) | 2 watts |
| Frequency for Max. Ratings (CW) | 500 MHz |
| Cooling | Forced Air |
| Cathode Voltage Current |
Oxide-coated Unipotential 6.0 volts 2.6 amperes |
| Capacitances (Grounded Cath. Connection) Input Output Feed-through |
15.7 pF 4.5 pF 0.04 pF |
| Capacitances (Grounded Grid Connection) Input Output Feed-through |
13.0 pF 4.5 pF 0.01 pF |
| Amplification Factor (g1-g2) | 5 |
| Base | 9-Pin Special |
| Recommended Air-System Socket | SK-600A |
| Recommended Air Chimney | SK-606 |
| Maximum Seal & Anode Core Temperature | 250°C |
| Maximum Length | 2.46 in; 62.50 mm |
| Maximum Diameter | 1.64 in; 41.70 mm |
| Weight (approximate) | 4 oz; 113 gm |
| Operating Position | Any |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Marconi | B 6122 | 250 |
| BD 272 | 250 | |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Eimac | Richardson Electronics | |
| 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 |