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| Part Number | EF91 |
| Description | R.F. Pentode |
| Info | . |
| Manufacture | Mullard |
| for PC | Download EF91 Datasheet |
| Part Number | EF91 |
| Description | Pentode 1955 |
| Info | page 1 2 3 EF91 sheet 1 2 FP date 1955.02.02 195. |
| Manufacture | Philips |
| for PC | Download EF91 Datasheet |