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| Part Number | ECH21 |
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| Manufacturer | Philips | |
| Short Description | Triode - Heptode | |
| Long Description | page 1 2 3 4 5 ECH21 sheet 1 2 3 4 FP date 1953.04.04 1953.04.04 1953.04.04 1953.04.04 1999.06.26 |
Datasheet : ECH21 |
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