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7403N: Difference between revisions
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{{Oscilloscope Sidebar |manufacturer=Tektronix |designers=| | {{Oscilloscope Sidebar |manufacturer=Tektronix | | ||
designers=Phil Crosby;| | |||
series=7000-series scopes | | |||
model= 7403N | | model= 7403N | | ||
image=Tek_7403n_4.jpg| | image=Tek_7403n_4.jpg| | ||
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and a rackmount version, the R7403N, with the CRT to the left of the plug-ins. | and a rackmount version, the R7403N, with the CRT to the left of the plug-ins. | ||
The 7403 was designed from the ground up. | The 7403 was designed from the ground up. [[Phil Crosby]] led the design. | ||
[[Phil Crosby]] led the design. | |||
The design team decided to use a discrete transistor vertical output amplifier rather than a hybrid on beryllium oxide. | The design team decided to use a discrete transistor vertical output amplifier rather than a hybrid on beryllium oxide. | ||
The output stage approximated a 3 pole [[MFED response]] with an additional real pole closer to the origin. | The output stage approximated a 3 pole [[MFED response]] with an additional real pole closer to the origin. | ||
Since the DC requirement was 3 screen diameters, the gain at the -3db point could be substantially less, | Since the DC requirement was 3 screen diameters, the gain at the -3db point could be substantially less, meaning that the load resistor (and output stage dissipation) could be reduced, allowing the design to meet scan bandwidth and corner shift criteria with substantially reduced power dissipation. | ||
meaning that the load resistor (and output stage dissipation) could be reduced, | |||
allowing the design to meet scan bandwidth and corner shift criteria | |||
with substantially reduced power dissipation. | |||
The 7403N was discontinued around 1975, having been superseded largely by the popular [[7603]] introduced in 1973. | The 7403N was discontinued around 1975, having been superseded largely by the popular [[7603]] introduced in 1973. | ||
In 1974, the 7403N had a list price (without plug-ins) of $950. | In 1974, the 7403N had a list price (without plug-ins) of $950. In the same year, the 7603 was $1600. | ||
In the same year, the 7603 was $1600. | |||
{{MissingSpecs}} | {{MissingSpecs}} | ||