| GENERAL DESCRIPTION |
|
Vapour cooled transmitting triode with integral filament leads. The grid terminal is suitable for cathode drive operation. |
| TECHNICAL SPECIFICATIONS | |
| ABRIDGED DATA | |
| Anode dissipation | 125 kW max |
| Anode voltage | 14 kV max |
| Frequency for full ratings | 27 MHz max |
| Output power (class C telegraphy) | 200 kW |
| ELECTRICAL | |
| Filament (two sections) | thoriated tungsten |
| Filament voltage per section | 9.6 V |
| Filament current per section | 290 A |
| Surge filament current per section (peak) | 700 A max |
| Filament cold resistance per section | 4.0 mohm |
| Peak usable cathode current | 175 A |
| Perveance | 6.0 mA/V |
| Amplification factor (Va = 9.0 kV, Ia = 5.0 A) |
34 |
| Mutual conductance (Va = 9.0 kV, Ia = 5.0 A) |
85 mA/V |
| Inter-electrode capacitances (average) grid to anode grid to filament anode to filament |
108 pF 259 pF 3.5 pF |
| MECHANICAL | |
| Net weight | 57 kg approx |
| Mounting position | vertical, filament end up |
| 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 |
| Econco | ||
| 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 |