| Part Number | E91H |
| Manufacturer | Philips |
| Title | Dual Control Heptode |
| Description | page 1 2 3 4 5 6 7 8 9 10 11 12 13 E91H sheet 1 2 3 A B C D E F G H I FP date 1957.12.12 1957.12.12 1957.12.12 1957.06.06 1957.06.06 1957.06.06 ... |
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| Datasheet |
 E91H Datasheet
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