Generating tetrode for single-sideband wave amplification with frequencies up to 250 MHz.
Metal-ceramic design with collar electrode terminals.
Forced air cooling 150 m3/h
Mass 2.5 kg
Main parameters
(at filament voltage 26 V, anode voltage 1.7 kV, 1st grid voltage 250 V, anode current 1,5 A)
| Filament current, A | 4.85±0.25 |
| 2nd grid current, not more than, mA | 80 |
| 1st grid offset voltage (negative), V | 28±10 |
| Cutoff voltage (negative) at anode voltage 4 V, anode current 20 mA, not more than, V | 120 |
| Transconductance, mA/V | 92.5±27.5 |
| 1st to 2nd grid gain ratio | 5±2 |
| Readiness time, not more than, min | 3.5 |
| Oscillating power in AB1 class mode (at anode voltage 3 kV, 2nd grid voldage 300 V), not less than, kW | 2.5 |
| Interelectrode capacitance, pF input output input-to-output, not more than | 155±15 22.5±3.5 0.2 |
| Lifetime, h | 1000 |
| Lifetime oscillating power in AB1 class mode, kW | 2 |
Operational limits
| Filament voltage, V | 24.7-27.3 |
| Anode voltage, kV | 3.2 |
| Peak anode voltage, kV | 5.5 |
| 2nd grid voltage, V | 300 |
| 1st grid voltage (negative), V | 150 |
| Anode power dissipation, kW | 2.5 |
| 2nd grid power dissipation, W | 35 |
| 1st grid power dissipation, W | 5 |
| Cathode current (constant component), A | 2.2 |
| Operating frequency, MHz | 250 |
| Bulb and junction temperature, oC | 200 |
| Ambient air temperature, oC | -60..+50 |
