GU50 / VU72 / CV1072 / 10E/11530 mercury vapour rectifier.
| Filament voltage | 4V |
| Filament current | 3A |
| Max working PIV | 4.2kV |
| Max DC output current | 250mA |
| Max temp of condensed mercury | 60C |
| Min temp of condensed mercury | 25C |
| Max frequency of supply | 150Hz |
| Max peak anode current | 1A |
| Min choke inductance at max output current | 4.5H |
| Pin | Function |
| 1 | n/c |
| 2 | n/c |
| 3 | Filament |
| 4 | Filament |
| TC | Anode |
The valve measures 140x48mm overall.
