Short, heavy leads and low inter-electrode capacities permit its use at maximum ratings through 150 MHz.
| GENERAL DESCRIPTION |
|
The 4-65A / QB3/200 is a small radial-beam tetrode. In most applications, no forced air is required, normal radiation and convection cooling being adequate. Short, heavy leads and low inter-electrode capacities permit its use at maximum ratings through 150 MHz. |
|
| TECHNICAL SPECIFICATIONS | |
| Plate Dissipation (Max.) | 65 watts |
| Screen Dissipation (Max.) | 10 watts |
| Grid Dissipation (Max.) | 5 watts |
| Frequency for Max. Ratings (CW) | 150 MHz |
| Cooling | Convection & Radiation |
| Filament Voltage Current |
Thoriated Tungsten 6.0 volts 3.5 amperes |
| Capacitances (Gnd. Cath. Connection) Input Output Feed-through |
7.1 pF 2.3 pF 0.1 pF |
| Amplification Factor (g1-g2) | 6 |
| Base | 5-Pin Special |
| Recommended Heat Dissipating Connector | HR-6 |
| Maximum Seal Temperature | 200°C |
| Maximum Envelope Temperature | 225°C |
| Maximum Length | 4.37 in; 111.00 mm |
| Maximum Diameter | 2.36 in; 60.40 mm |
| Weight (approximate) | 3 oz; 85.0 gm |
| Operating Position | Vertical, base up or down |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Gates | HF1 | 1 |
| HF-100 | 100 | |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Covimag | Richardson Electronics | |
| Penta Laboratories | ||
| Vacuum Tubes, Inc. | ||
| 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 |