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ECH21 - Triode - Heptode

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The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.