3A3: Difference between revisions
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{{Plugin Sidebar| | {{Plugin Sidebar| | ||
manufacturer=Tektronix |series=560-series scopes |type=3A3 | | manufacturer=Tektronix |series=560-series scopes |type=3A3 | | ||
summary=Dual | summary=Dual Trace Differential Amplifier Plugin | | ||
image=3a3 front.jpg | | image=3a3 front.jpg | | ||
caption=Type 3A3 | caption=Type 3A3 Front View (SN 4990 up) | | ||
designers=Roy Hayes| | designers=Roy Hayes| | ||
introduced=1964 | | introduced=1964 | | ||
Line 18: | Line 18: | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Bandwidth | 500 kHz or 5 kHz (switch-selectable) }} | {{Spec | Bandwidth | 500 kHz or 5 kHz (switch-selectable) }} | ||
{{Spec | Deflection | 0.1 mV/Div to 10 V/Div, 1−2−5 }} | {{Spec | Deflection | 0.1 mV/Div to 10 V/Div, in 1−2−5 steps }} | ||
{{Spec | Input impedance | 1 MΩ // 47 pF }} | {{Spec | Input impedance | 1 MΩ // 47 pF }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
Line 30: | Line 30: | ||
===Older version (below SN 4990, Nuvistor in input stage)=== | ===Older version (below SN 4990, Nuvistor in input stage)=== | ||
<gallery> | <gallery> | ||
3A3 front SN4990below.jpg | Front | 3A3 front SN4990below.jpg | 3A3 Front | ||
3A3_right_SN4990below.jpg | Right | 3A3_right_SN4990below.jpg | 3A3 Right | ||
3A3_left_SN4990below.jpg | Left | 3A3_left_SN4990below.jpg | 3A3 Left | ||
3a3 001.JPG | Nuvistor in | 3a3 001.JPG | 3A3, Nuvistor in Input Stage | ||
</gallery> | </gallery> | ||
===Newer version (from SN 4990 up, FET in input stage)=== | ===Newer version (from SN 4990 up, FET in input stage)=== | ||
<gallery> | <gallery> | ||
3a3 front.jpg | Front | 3a3 front.jpg | 3A3 Front | ||
3a3 right.jpg | Right | 3a3 right.jpg | 3A3 Right | ||
3a3 left.jpg | Left | 3a3 left.jpg | 3A3 Left | ||
3a3 top.jpg | Top | 3a3 top.jpg | 3A3 Top | ||
3a3 bottom.jpg | Bottom | 3a3 bottom.jpg | 3A3 Bottom | ||
3A3 002.JPG | Dual JFET in | 3A3 002.JPG | 3A3, Dual JFET in Input Stage | ||
</gallery> | </gallery> | ||
Revision as of 23:39, 16 September 2023
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, in 1−2−5 steps |
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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3A3 Front
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3A3 Right
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3A3 Left
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3A3, Nuvistor in Input Stage
Newer version (from SN 4990 up, FET in input stage)
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3A3 Front
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3A3 Right
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3A3 Left
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3A3 Top
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3A3 Bottom
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3A3, Dual JFET in Input Stage