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REL52 / 878A high voltage halfwave rectifier

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This valve measures 177x50mm overall and has a 4 pin base |
| Filament voltage | 2.5V |
| Filament current | 5A |
| Max RMS anode voltage | 7100V |
| Max PIV | 20kV |
| Max continuous DC output current | 5mA |
| Pin | Function |
| 1 | Filament |
| 4 | Filament |
| TC | Anode |
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