3A3: Difference between revisions
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m (→top: clean up, replaced: title=Tektronix → manufacturer=Tektronix |series=560-series scopes |type=, {{Plugin Sidebar 2 → {{Plugin Sidebar, series=560-series scopes → designers=) |
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image=3a3 front.jpg | | image=3a3 front.jpg | | ||
caption=Type 3A3 front view (SN 4990 up) | | caption=Type 3A3 front view (SN 4990 up) | | ||
designers=Roy Hayes | designers=Roy Hayes| | ||
introduced=1964 | | introduced=1964 | | ||
discontinued=1972 | | discontinued=1972 | | ||
Revision as of 12:25, 15 August 2021
The Tektronix 3A3 is a dual trace differential amplifier for 560-series scopes. It was designed by Roy Hayes.
Key Specifications
| Bandwidth | 500 kHz or 5 kHz (switch-selectable) |
|---|---|
| Deflection | 0.1 mV/Div to 10 V/Div, 1−2−5 |
| Input impedance | 1 MΩ // 47 pF |
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 (below SN 4990, Nuvistor in input stage)
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Front
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Right side
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Left side
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Nuvistor in input stage
Newer version (from SN 4990 up, FET in input stage)
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Front
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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
