3A3
Template:Plugin Sidebar 2 The Tektronix 3A3 is a dual trace differential amplifier for 560-series scopes. It was designed by Roy Hayes.
Key Specifications
Bandwidth | switch-selectable, 5 kHz or 500 kHz |
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Internals
Early 3A3s use a 7586 Nuvistor for the front end cathode follower. Serial numbers 4990 and up use a dual JFET.
Pictures
Older version (SN 4990 below , Nuvistor in input stage)
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Front SN4990 below
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Right side
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Left side
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Nuvistor in input stage
Newer version (SN 4990 up, FET in input stage)
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Front SN4990 up
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Right side
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Left side
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Top
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Bottom
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Dual JFET in input stage