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The '''Tektronix 7403N''' is a 65 MHz oscilloscope mainframe that takes two 7000-series vertical plug-ins | The '''Tektronix 7403N''' is a 65 MHz oscilloscope mainframe that takes two 7000-series vertical plug-ins | ||
and one 7000-series horizontal plug-in. It has a large CRT (8 × 10 divisions @ 1.22 cm each, [[154-0640-00|154-0640-xx]] or [[154-0672-00|154-0672-xx]] tubes). There is no readout system. | and one 7000-series horizontal plug-in. It has a large CRT (8 × 10 divisions @ 1.22 cm each, | ||
[[154-0640-00|154-0640-xx]] or [[154-0672-00|154-0672-xx]] tubes). There is no readout system. | |||
The 7403N was discontinued around 1975, having been superseded largely by the popular [[7603]] introduced in 1973. | The 7403N was discontinued around 1975, having been superseded largely by the popular [[7603]] introduced in 1973. |