Base coaxial contact rings are provided for the filament, grid, and screen terminals, and these terminals are cooled with forced air. The maximum anode dissipation rating is 300 kilowatts steady state, with multiphase cooling.
| GENERAL DESCRIPTION |
|
The 4CM300,000GA / TH537 / CW1603J2 / DB930 is a ceramic/metal, multiphase-cooled (water/vapor) power tetrode. This tube has a thoriated tungsten mesh filament and pyrolytic graphite grids which provide high-dissipation combined with low secondary emission characteristics. Base coaxial contact rings are provided for the filament, grid, and screen terminals, and these terminals are cooled with forced air. The maximum anode dissipation rating is 300 kilowatts steady state, with multiphase cooling. |
|
| TECHNICAL SPECIFICATIONS | |
| ELECTRICAL | |
| Filament Voltage (DC or AC) Current at 18.0 volts nominal Peak Maximum Filament Inrush Current at Turn-on |
Thoriated Tungsten 18.0 Volts 430 Amperes 860 Amperes |
| Amplification Factor, average Grid to Screen | 4.3 |
| Maximum Frequency of CW Ratings | 50 MHz |
| Highest Useful Frequency With Reduced Ratings | 110 MHz |
| Direct Interelectrode Capacitance (nominal values) Cg1k Cg2k Cpk Cg1g2 Cg1p Cg2p |
310 pF 26 pF 0.8 pF 510 pF 4.5 pF 75 pF |
| MECHANICAL | |
| Maximum Overall Dimensions Length Diameter |
22.0 in; 56.0 cm 12.3 in; 31.1 cm |
| Net Weight (approximate) | 125 lbs; 57 kg |
| Operating Position | Vertical, base down |
| Cooling | Water & Forced Air |
| Maximum Operating Temperature: Envelope and Ceramic/Metal Seals |
200°C |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Continental Electronics | 419 G | 250 |
| Marconi | B 6131 | 250 |
| B 6124 | 300 | |
| B 6126 | 300 | |
| B 6128 | 500 | |
| Thomson | TRE 2331 | 300 |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| e2v technologies | Kennetron | Richardson Electronics |
| Thales | ||
| Xuguang | ||
| 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 |