| GENERAL DESCRIPTION |
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The ML-6427 is a general-purpose triode suitable for industrial heating, AM broadcasting and pulse modulation. The tube features a coaxial mounting structure providing high-dissipation, low-inductance rf electrode terminals. The cathode consists of sturdy, self-supporting, stress-free, thoriated-tungsten filaments. The ML-6427 has a forced-air-cooled, heavy-wall anode with high-efficiency disc fins capable of dissipating 20 kW. The tube will operate with plate voltages up to 12.5 kV in CW operation or 35 kV in pulse modulator service. Maximum ratings apply at frequencies up to 30 MHz. Useful power output can be obtained at frequencies up to 70 MHz with reduced ratings. In a typical pulse modulator application this tube is capable of switching 2.1 Mw. |
| TECHNICAL SPECIFICATIONS | |
| ELECTRICAL | |
| Filament Voltage | 8.0 Volts |
| Filament Current | 200 Amps |
| Filament Starting Current, maximum | 800 Amps |
| Filament Cold Resistance | 0.0051 Ohms |
| Amplification Factor | 20 |
| Interelectrode Capacitances Grid-Plate Grid-Filament Plate-Filament |
38 pf 50 pf 1.8 pf |
| MECHANICAL | |
| Mounting Position | Vertical, Anode Down |
| Type of Cooling | Forced-air |
| Air Flow on Anode, minimum for 20 kW dissipation |
Pressure : 1000 cfm at 7.7" water Exhaust: 1150 cfm at 8.4" water |
| Maximum incoming air temperature | 50 °C |
| Maximum Envelope Temperature | 165 °C |
| Net Weight, approximate | 30 lbs. |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Continental Electronics | 417 B | 50 |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Econco | Richardson Electronics | |
| 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 |