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[https://vintagetek.org/years-at-tektronix-hofer/ Bruce Hofer recalls] investigating this issue and | [https://vintagetek.org/years-at-tektronix-hofer/ Bruce Hofer recalls] investigating this issue and | ||
concluding that an redesign was needed. | concluding that an redesign was needed. | ||
The redesign led to the introduction of the 7B92A, [[Patent US 4009399A]], | The redesign led to the introduction of the [[7B92A]], [[Patent US 4009399A]], | ||
and the [[067-0657-00]] calibration fixture. | and the [[067-0657-00]] calibration fixture. | ||
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