| GENERAL DESCRIPTION |
|
The 4-125A / QB3/300GA / RS 1007 is intended for use as an amplifier, oscillator or modulator. It has a maximum plate voltage rating of 3 kV at frequencies up to 120 MHz. |
| TECHNICAL SPECIFICATIONS | |
| Plate Dissipation (Max.) | 125 watts |
| Screen Dissipation (Max.) | 20 watts |
| Grid Dissipation (Max.) | 5 watts |
| Frequency for Max. Ratings (CW) | 120 MHz |
| Cooling | Radiation & Forced Air |
| Filament Voltage Current |
Thoriated Tungsten 5.0 volts 6.5 amperes |
| Capacitances (Gnd. Cath. Connection) Input Output Feed-through |
10.8 pF 3.1 pF 0.05 pF |
| Amplification Factor (g1-g2) | 5.9 |
| Base | 5-Pin Special |
| Recommended Air-System Socket | SK-410 |
| Recommended Heat Dissipating Connector | HR-6 |
| Maximum Seal Temperature | 200°C |
| Maximum Envelope Temperature | 225°C |
| Maximum Length | 5.69 in; 144.50 mm |
| Maximum Diameter | 2.81 in; 71.40 mm |
| Weight (approximate) | 6.5 oz; 184.0 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 |
| Collins | 231D-20 | 3 |
| Continental Electronics | 417 B | 50 |
| 420 A | 500 | |
| Gates | HF-5 / HF-5 B | 5 |
| HF-10 / HF-10B | 10 | |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Covimag | 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 |