Vacuum tubes
Generating tetrode GU-70B in metal-ceramic casing with oxide cathode of indirect heating and external anode with forced air cooling is designed for SSB signal amplification with output power up to 250V and frequency up to 250 Mhz and output power up to 125V in fixed and mobile wireless devices.
Casing – ceramic metal.
Cooling – air, forced, 45 m3/h.
Weight: 150 g.
Basic technical parameters of GU-70B | |
| Heater current | 3,1± 0,5 А |
| Cathode heating time | Maximum 60 s |
| Racking power | Minimum 250 W |
| Interelectrode capacitance | |
| - input | maximum29 |
| - output | maximum7,5 |
| - transfer | maximum0,06 |
| Life cycles | Minimum 1000 h |
Operating characteristics of GU-70B | |
| Heater voltage | 5,7 - 6,3 V |
| Anode voltage | 2 kV |
| Anode voltage(peak) | 3,5 kV |
| Voltage cathode – heater | 100 V |
| Cathode current(direct component) | 360 mА |
| Cathode current (peak) | 1200 mА |
| Power dissipated by anode | 350 W |
| Operating frequency | 250 MHz |
| Anode temperature and ceramic-to-metal seal | 200 С |
| Environment operating temperatures interval | from-60 to+50 С |
