CV2349 gas-filled arc discharge tetrode
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This valve measures 70x17mm overall and has a B7G base |
This is an arc discharge tetrode with a cathode designed for pulse operation. It is equally suited as a strobotron. It is based on the EN30.
| Max D.C. anode voltage | 400V |
| Min D.C. anode voltage | 250V |
| Max peak anode current (a) | 250A |
| Max mean anode current | 50mA |
| Peak inverse anode voltage | 250V |
| Trigger voltage (b) | 80 to 130V |
| Max average grid current | 10mA |
| Max flashing frequency | 250 per sec |
| Ambient temperature range | -35 to +60°C |
| Starting characteristics (b) | |
| Min trigger current (Va=400) | 50µA |
| Min trigger current (Va=250) | 300µA |
| Max delay time (c) | 40µs |
| Typical operating conditions as a stroboscopic source | |
| D.C. supply voltage | 330V |
| Screen voltage | 70V |
| Trigger pulse amplitude (d) | 150V |
| Charging resistor | 6000 ohms |
| Discharge capacitor (µF) for operation at (Hz): | |
| 6 to 35 | 2 |
| 30 to 50 | 1.5 |
| 45 to 80 | 1.0 |
| 80 to 150 | 0.5 |
| 140 to 250 | 0.3 |
(a) A minimum of 5A is necessary for the formation of an arc discharge with a tube drop of approx. 20V. if the main gap current is less than 5A peak, a glow discharge is likely to form with a 70V drop and result in excessive cathode dissipation.
(b) For triggering between Grid 2 and Grid 1, with Grid 2 positive with respect to grid 1
(c) Less than 40µs dependent on circuit conditions. With higher energy pulses the delay time can be considerably reduced
(d) With 100µs square pulses, negative with respect to Grid 2. Narrower pulses require a higher amplitude
| Pin | Function |
| 1 | Grid 1 |
| 2 | i/c |
| 3 | i/c |
| 4 | Cathode |
| 5 | Cathode |
| 6 | i/c |
| 7 | Grid 2 |
| Top cap | Anode |
