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The 556 was the last 500-series scope produced.  It was present in the [[Media:1974_Tektronix_Catalog.pdf|1974 catalog]], but gone in the [[Media:1975_Tektronix_Catalog.pdf|1975 catalog]].
The 556 was the last 500-series scope produced.  It was present in the [[Media:1974_Tektronix_Catalog.pdf|1974 catalog]], but gone in the [[Media:1975_Tektronix_Catalog.pdf|1975 catalog]].
(The dual-beam [[7844]] had been introduced in 1974.)
(The dual-beam [[7844]] had been introduced in 1974.)
The designers of the 556 were [[Phil Crosby]], [[Larry Biggs]], [[Ron Olson]], and [[Arend Kastelein]].


{{BeginSpecs}}
{{BeginSpecs}}

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