CV1949 argon thyratron / RF noise source
| The valve measures 53x17mm overall and has a B7G base. |
| Heater voltage | 6.3V |
| Heater current | 250mA |
| Max DC supply anode voltage | 250V |
| Peak forward anode voltage | 350V |
| Peak inverse anode voltage | 350V |
| Max DC grid voltage | -150V |
| Peak DC anode current | 110mA |
| Max DC anode current | 25mA |
| Max heater-cathode voltage | -110V |
| Max cathode heating time | 30 secs |
| Max duty cycle | 0.75% |
| Max ambient operating temperature | -55 to +90 C |
| Pin | Function |
| 1 | Grid |
| 2 | n/c |
| 3 | Heater |
| 4 | Heater |
| 5 | Cathode |
| 6 | n/c |
| 7 | Anode |
Although this thyratron can be used normally, it is more famous for its use as an RF noise source. With the valve mounted in a magnetic field arranged such that the electron beam is deflected towards the top of the valve - with magnetic north at pin 7 - the following test data is specified:
| Frequency, MHz | Min. noise voltage, µV, RMS |
| 0.1 | 10,000 |
| 0.2 | 14,000 |
| 0.5 | 25,000 |
| 1.0 | 22,000 |
| 2.0 | 7,000 |
| 5.0 | 500 |
| 10.0 | 70 |
